what did I do wrong?

stang fanatic · May 9th, 2006, 11:26 PM

Recently I purchased a 87 gt with a supposed 347..NOT!!! I pulled the rear-end to installe new gears, replaced a bad yoke on the driveshaft and pulled the trans to make some repairs. While all this was happening, I decided to pull the dash out, and replace the broken heater core, and install a given set of used 19# injectors since I was told that the ones in the car were aftermarket 24#. Since all was now in question, I disconnected the oil level sensor and O2 sensors and completely pulled out the k-member, and so on and so forth to such bad news. Now, I put it all back together, started the car, ensured the timing was good and** found when i shut the car off, the fuel door release unit kept clicking due to the fact i accidentally plugged it intp another connector where it shouldnt have been(and I still dont know what the connector is)**. I then disconnected the tps sensor, started the car and tried to manully lower the idle speed which was NOT happening, so I plugged the tps sensor back in and the car died. I then made several attempts to start the unit to no success. I can get the car started the first time with ether, and to idle with the screw cranked way in but the car is clearly OVERFUELING. I have REPLACED the MAP sensor, ALL the vacuum lines, the TPS sensor, the INLET AIR TEMP and COOLANT TEMP sensors, the ignition module had been recently replaced because i have slowly started to experience a jerking like a loss of electrical power at around 2300 rpms, I replaced the P/UP coil and IGNITION coil, and installed a new F/P REGULATOR. This car had started out with just spending a little and has sunk my A__!!! I'm sorry for the long story, but as a (OH CRAP) heavy truck tech...I know all info is most important. I also had a hotrod shop look into with no luck but has said there were NO codes. Any help given here would be most appreciated!!! Thanks GUYS!!!!!!!!!!!!

Aliate X · May 9th, 2006, 11:45 PM

If you were told the car had #24's, the MAF is going to be calibrated for 24's, when you installed 19's, did you change the MAF to a unit calibrated for 19's?

stang fanatic · May 10th, 2006, 12:02 AM

My stupid.....its an sdi system, not mass air. the guy thought the sdi systems had the learning computers and so he claimed to put have put in 24's which was a lie, they were 19's and by the way, i put them back cause i thought the used ones i had got were bad.

stang fanatic · May 10th, 2006, 12:13 AM

One last thing....the small black that goes from the neg terminal of the batt. to the body which then goes to the eec shows 12.7 ohms of resistence between the body screw and the batt when the eec is connected...anyone know why this resistence went up with the eec connected??? tried a second eec...no cure.

Mustang8719 · May 10th, 2006, 07:06 PM

What about a Vaccum leak?
Are you sure you didn't tear one of the injector o-rings?

I went through the same thing Minus the Fuel door issue.

Mine was a vaccum leak. Mine would start and run if I unplugged a Vaccum line.But when I plugged it back in it would die.

stang fanatic · May 10th, 2006, 07:14 PM

no torn injector o-rings...vacuum leak...no. but yes, as i start to open up air to the system by unplugging lines it starts to run better, but still, if i stomp on the throttle, it still flat spots and backfires both ways. unplugging the fuel pump relay lets it start idling better until theres no more fuel. And why will it not start like for the first time for the day unless i ether it...and then start ok for the next several hours?

Mustang8719 · May 10th, 2006, 07:33 PM

Still could be something with Vaccum. Mine acted the Same way. It took me 3 weeks to find the Leak.

I also got a reading of Normal Vaccum with the leak as well. Thats why I was so stumped.

stang fanatic · May 10th, 2006, 07:36 PM

yeah...i dont hear a leak except through the throttle, but when i put the intake boot on, you cant hear it. Brake kleen or carb cleaner to try to find one?

Mustang8719 · May 10th, 2006, 07:41 PM

Yes that is how I finally found mine.
Mine was in the lower intake just under the throttle body. It was hard to get to it to spray as well.

stang fanatic · May 10th, 2006, 07:50 PM

ok...if it is the case, the only place for mine would be between the upper and lower and a cracked nipple for one of the lines....
I think i need to also try doing the reset thing and ensuring my tps voltages are correct. to speculate, if the car would idle at normal throttle opening with alot of the lines off, then that would help and not affect the reset process???

Mustang8719 · May 10th, 2006, 08:06 PM

Not to sure about that.
I know these SD cars are Very picky about Vaccum.

stang fanatic · May 11th, 2006, 12:35 AM

I say that because its a condition that just up and happened...i was told wrong on setting the idle, and when i plugged the tps back in, the car died and thats when all this started.Did ck..no leaks that i can find...gonna have to wait to recover $$$$$$$$ and throw some new o2's.

99mustang232 · May 11th, 2006, 01:08 AM

did you try switching back the injectors to see if the new problem went away?

stang fanatic · May 11th, 2006, 01:18 AM

I did go back to the ones that were on there to start with, yes. It is idling at its normal setting, it just idles like it has the biggest baddest cam you can get, and has left a big ass black circle in my driveway and guaranteed to make you cry if you stand behind it. And it still doesnt start if it sits long enough...but 2 small squirts of ether and it fires like theres nothing wrong and will start again and again unless you let it sit for awhile

Mustang8719 · May 11th, 2006, 06:34 PM

The hose didn't come off the Map sensor did it?

stang fanatic · May 11th, 2006, 08:35 PM

hehehe....nice thought but no. I did brainstorm a thought from something i read the other day from an old topic which is that if the coolant lines are off of the egr plate....hot exhaust gases are essentially building up against the plate and valve...removed them....just need to clean them and re-install with new gaskets and retry.

Mustang8719 · May 11th, 2006, 08:48 PM

Hopefully that is it.

IcantDo55 · May 11th, 2006, 09:53 PM

Originally Posted by Mustang8719

Hopefully that is it.

Prob not.

Whats your TPS set at? Try .98V

You talk about "disconecting the TPS" to set the idle? Why? Who told you that? If you manually want to set the idle dosconect the IAC and than adjust it.

stang fanatic · May 11th, 2006, 10:45 PM

tps is set at .99, friend who knows corvettes told me to try it that way, do understand about disconnecting the iac solenoid and all now...plenum looks ok at egr plate, gaskets look shit and found 2 large pits in the iacv passage on the intake side, one of which leads to an outside air wall but hasnt quite gone through just yet.....jb welding pits, will cleanup tomorow and retry.

stang fanatic · May 13th, 2006, 02:12 AM

NO HELP....PULLED INTAKE AND FOUND I BOLT LOOSE. FIGURE 20 YEAR OLD INTAKE GASKETS MIGHT NEED TO BE CHANGED....

May 9th, 2006, 11:26 PM	#1
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	what did I do wrong? Recently I purchased a 87 gt with a supposed 347..NOT!!! I pulled the rear-end to installe new gears, replaced a bad yoke on the driveshaft and pulled the trans to make some repairs. While all this was happening, I decided to pull the dash out, and replace the broken heater core, and install a given set of used 19# injectors since I was told that the ones in the car were aftermarket 24#. Since all was now in question, I disconnected the oil level sensor and O2 sensors and completely pulled out the k-member, and so on and so forth to such bad news. Now, I put it all back together, started the car, ensured the timing was good and found when i shut the car off, the fuel door release unit kept clicking due to the fact i accidentally plugged it intp another connector where it shouldnt have been(and I still dont know what the connector is). I then disconnected the tps sensor, started the car and tried to manully lower the idle speed which was NOT happening, so I plugged the tps sensor back in and the car died. I then made several attempts to start the unit to no success. I can get the car started the first time with ether, and to idle with the screw cranked way in but the car is clearly OVERFUELING. I have REPLACED the MAP sensor, ALL the vacuum lines, the TPS sensor, the INLET AIR TEMP and COOLANT TEMP sensors, the ignition module had been recently replaced because i have slowly started to experience a jerking like a loss of electrical power at around 2300 rpms, I replaced the P/UP coil and IGNITION coil, and installed a new F/P REGULATOR. This car had started out with just spending a little and has sunk my A__!!! I'm sorry for the long story, but as a (OH CRAP) heavy truck tech...I know all info is most important. I also had a hotrod shop look into with no luck but has said there were NO codes. Any help given here would be most appreciated!!! Thanks GUYS!!!!!!!!!!!!

May 10th, 2006, 12:02 AM	#3
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	My stupid.....its an sdi system, not mass air. the guy thought the sdi systems had the learning computers and so he claimed to put have put in 24's which was a lie, they were 19's and by the way, i put them back cause i thought the used ones i had got were bad. __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 10th, 2006, 12:13 AM	#4
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	One last thing....the small black that goes from the neg terminal of the batt. to the body which then goes to the eec shows 12.7 ohms of resistence between the body screw and the batt when the eec is connected...anyone know why this resistence went up with the eec connected??? tried a second eec...no cure. __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 10th, 2006, 07:06 PM	#5
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	What about a Vaccum leak? Are you sure you didn't tear one of the injector o-rings? I went through the same thing Minus the Fuel door issue. Mine was a vaccum leak. Mine would start and run if I unplugged a Vaccum line.But when I plugged it back in it would die. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

May 10th, 2006, 07:14 PM	#6
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	no torn injector o-rings...vacuum leak...no. but yes, as i start to open up air to the system by unplugging lines it starts to run better, but still, if i stomp on the throttle, it still flat spots and backfires both ways. unplugging the fuel pump relay lets it start idling better until theres no more fuel. And why will it not start like for the first time for the day unless i ether it...and then start ok for the next several hours? __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 9th, 2006, 11:45 PM	#2
Aliate X Regular Join Date: Aug 2005 Posts: 213 iTrader: 0 reviews	If you were told the car had #24's, the MAF is going to be calibrated for 24's, when you installed 19's, did you change the MAF to a unit calibrated for 19's? __________________ Everything + Nitrous

May 10th, 2006, 07:33 PM	#7
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	Still could be something with Vaccum. Mine acted the Same way. It took me 3 weeks to find the Leak. I also got a reading of Normal Vaccum with the leak as well. Thats why I was so stumped. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

May 10th, 2006, 07:36 PM	#8
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	yeah...i dont hear a leak except through the throttle, but when i put the intake boot on, you cant hear it. Brake kleen or carb cleaner to try to find one? __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 10th, 2006, 07:41 PM	#9
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	Yes that is how I finally found mine. Mine was in the lower intake just under the throttle body. It was hard to get to it to spray as well. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

May 10th, 2006, 07:50 PM	#10
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	ok...if it is the case, the only place for mine would be between the upper and lower and a cracked nipple for one of the lines.... I think i need to also try doing the reset thing and ensuring my tps voltages are correct. to speculate, if the car would idle at normal throttle opening with alot of the lines off, then that would help and not affect the reset process??? __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 10th, 2006, 08:06 PM	#11
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	Not to sure about that. I know these SD cars are Very picky about Vaccum. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

May 11th, 2006, 12:35 AM	#12
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	I say that because its a condition that just up and happened...i was told wrong on setting the idle, and when i plugged the tps back in, the car died and thats when all this started.Did ck..no leaks that i can find...gonna have to wait to recover $$$$$$$$ and throw some new o2's. __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 11th, 2006, 01:08 AM	#13
99mustang232 MM Fanatic 1999 Ford Mustang V6 Join Date: Sep 2005 Location: newport news, va Posts: 3,745 iTrader: 0 reviews	did you try switching back the injectors to see if the new problem went away? __________________ ...even fire and single cammin 1986 Ford F-150 5.0L 2WD 1994 Toyota Pickup 2.4L 4WD 1999 Ford Mustang 3.8L V6 2002 Jeep Grand Cherokee 4.0L 2WD 2008 GMC Sierra Denali 6.2L AWD

May 11th, 2006, 01:18 AM	#14
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	I did go back to the ones that were on there to start with, yes. It is idling at its normal setting, it just idles like it has the biggest baddest cam you can get, and has left a big ass black circle in my driveway and guaranteed to make you cry if you stand behind it. And it still doesnt start if it sits long enough...but 2 small squirts of ether and it fires like theres nothing wrong and will start again and again unless you let it sit for awhile __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 11th, 2006, 06:34 PM	#15
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	The hose didn't come off the Map sensor did it? __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

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May 11th, 2006, 08:35 PM	#16
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	hehehe....nice thought but no. I did brainstorm a thought from something i read the other day from an old topic which is that if the coolant lines are off of the egr plate....hot exhaust gases are essentially building up against the plate and valve...removed them....just need to clean them and re-install with new gaskets and retry. __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 11th, 2006, 08:48 PM	#17
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	Hopefully that is it. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

May 11th, 2006, 10:45 PM	#19
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	tps is set at .99, friend who knows corvettes told me to try it that way, do understand about disconnecting the iac solenoid and all now...plenum looks ok at egr plate, gaskets look shit and found 2 large pits in the iacv passage on the intake side, one of which leads to an outside air wall but hasnt quite gone through just yet.....jb welding pits, will cleanup tomorow and retry. __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 13th, 2006, 02:12 AM	#20
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	NO HELP....PULLED INTAKE AND FOUND I BOLT LOOSE. FIGURE 20 YEAR OLD INTAKE GASKETS MIGHT NEED TO BE CHANGED.... __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

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