Engine troubles?

duvaltom · February 5th, 2012, 10:50 PM

my mustang today was running great, took for test drive was driving fine, stopped turned around and car backfired then turned around to go home and backfired more and loss power any more than 1/8 throttle and more popping reved when in driveway blew a flame..
what could be my problem?
also, my thermostat housing has a hole in the top for a sensor, i have the plugt on the wireing harness but am wondering what sensor goes there?

ryanw · February 5th, 2012, 11:20 PM

Nothing goes in the thermostat housing, i believe you have an after market housing, if you ever install an electric fan, you can plug a thermostat for the fan control there.

And about your problem ,Check your fuel pressure

cschoening09 · February 5th, 2012, 11:22 PM

Timing off?

duvaltom · February 6th, 2012, 02:27 PM

timeing is on and there is fuel presusre,
heres where it gets intresting, i put key in ignition to watch my gauge for fuel pressure and i see it, then go to crank over and she cranks once and . Dead.
could this be my altonatir?
car wont rev, and idles barly..

ryanw · February 6th, 2012, 02:53 PM

Before we rules out fuel pressure.... as being the cause or part of the issue...

What did the gauge read, you should get about 39 psi with vacuum line disconcted from the fuel pressure reg.

duvaltom · February 6th, 2012, 06:10 PM

im getting 40 psi on my gauge at the fuel rail... and same as when its running

ryanw · February 6th, 2012, 06:17 PM

So it cranks once and then acts ad if the batterys dead, and wont crank any more ?

duvaltom · February 6th, 2012, 06:46 PM

yes, then i charged the battery with my charger and it started, after about ten min it wanted to die, surging from 200 rpm to 1100 rpm about around there, then it wouldent start after that, just had the altenator checked at autozone it IS good,

Troy5.0 · February 6th, 2012, 08:00 PM

iac valve maybe

cschoening09 · February 6th, 2012, 08:01 PM

Can a starter be weak?.. I would test the starter too

cschoening09 · February 6th, 2012, 08:03 PM

Kinda sounds like a maf sensor issue? Try cleaning it with maf cleaner from parts store.

duvaltom · February 6th, 2012, 08:06 PM

Starter is actually new, most everything is from the build, and a dirty maf sensor? what would this do if dirty?

Troy5.0 · February 6th, 2012, 08:07 PM

i had trouble with the idle going from 200 to 1200 rpm i cleaned the IAC valve it worked for abit then i just ended up buying a new one and i havent had the problem since. but i didnt have the back fire problem that could be a faulty O2 sensor.

cschoening09 · February 6th, 2012, 08:07 PM

Run like shit. Similar to what you experiencing.

duvaltom · February 6th, 2012, 08:21 PM

so dirty maf or dirty IAC ile check them bolth in the morning deffinatly,

cschoening09 · February 6th, 2012, 08:37 PM

Good deal. Let us know.

cschoening09 · February 6th, 2012, 08:38 PM

You may have to have a safety torch bit to get maf sensor off. Not sure though. Mine does but it's an 01

duvaltom · February 6th, 2012, 08:48 PM

no i had it off once befor cuz i bought the maf used on cl,

FastStang91Lx · February 6th, 2012, 10:31 PM

Dude, if you have a voltage issue, then it's nothing with your sensors. Check all your power connections and ground connections. If everything looks good there, then take your alternator to a different place to get checked. Sometimes the kids at autozone don't know what they are doing.

cschoening09 · February 6th, 2012, 10:35 PM

Originally Posted by duvaltom

yes, then i charged the battery with my charger and it started, after about ten min it wanted to die, surging from 200 rpm to 1100 rpm about around there, then it wouldent start after that, just had the altenator checked at autozone it IS good,

Checked on test stand or in car through the battery with their batt,starter,and alt tester?

February 5th, 2012, 10:50 PM	#1
duvaltom Regular 1992 Lx hatch Join Date: Sep 2011 Location: Suffield Posts: 105 iTrader: 0 reviews	Engine troubles? my mustang today was running great, took for test drive was driving fine, stopped turned around and car backfired then turned around to go home and backfired more and loss power any more than 1/8 throttle and more popping reved when in driveway blew a flame.. what could be my problem? also, my thermostat housing has a hole in the top for a sensor, i have the plugt on the wireing harness but am wondering what sensor goes there?

February 5th, 2012, 11:20 PM	#2
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Nothing goes in the thermostat housing, i believe you have an after market housing, if you ever install an electric fan, you can plug a thermostat for the fan control there. And about your problem ,Check your fuel pressure __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears Last edited by ryanw; February 6th, 2012 at 12:21 AM.

February 5th, 2012, 11:22 PM	#3
cschoening09 Hardcore Enthusiast 2001 Mustang GT 9.30 @ 77mph-1/8th mile 2.2 60' Join Date: Oct 2010 Location: Council Bluffs, IA Posts: 1,703 iTrader: 3 reviews	Timing off? __________________ 01 GT. 5spd , 03-04 cobra clutch, on its 2nd 4.6l motor2nd tr3650 too,JLT CAI,UPR o/r x, magnapack catback, predator tuned, H&R ss 10.5" bullitts w/ nt555r DR's

February 6th, 2012, 02:53 PM	#5
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Before we rules out fuel pressure.... as being the cause or part of the issue... What did the gauge read, you should get about 39 psi with vacuum line disconcted from the fuel pressure reg. __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

February 6th, 2012, 06:17 PM	#7
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	So it cranks once and then acts ad if the batterys dead, and wont crank any more ? __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

February 6th, 2012, 02:27 PM	#4
duvaltom Regular 1992 Lx hatch Join Date: Sep 2011 Location: Suffield Posts: 105 iTrader: 0 reviews	timeing is on and there is fuel presusre, heres where it gets intresting, i put key in ignition to watch my gauge for fuel pressure and i see it, then go to crank over and she cranks once and . Dead. could this be my altonatir? car wont rev, and idles barly..

February 6th, 2012, 06:10 PM	#6
duvaltom Regular 1992 Lx hatch Join Date: Sep 2011 Location: Suffield Posts: 105 iTrader: 0 reviews	im getting 40 psi on my gauge at the fuel rail... and same as when its running

February 6th, 2012, 06:46 PM	#8
duvaltom Regular 1992 Lx hatch Join Date: Sep 2011 Location: Suffield Posts: 105 iTrader: 0 reviews	yes, then i charged the battery with my charger and it started, after about ten min it wanted to die, surging from 200 rpm to 1100 rpm about around there, then it wouldent start after that, just had the altenator checked at autozone it IS good,

February 6th, 2012, 08:00 PM	#9
Troy5.0 Newbie 1988 mustang LX Join Date: Jul 2010 Location: Aylmer Posts: 41 iTrader: 0 reviews	iac valve maybe

February 6th, 2012, 08:01 PM	#10
cschoening09 Hardcore Enthusiast 2001 Mustang GT 9.30 @ 77mph-1/8th mile 2.2 60' Join Date: Oct 2010 Location: Council Bluffs, IA Posts: 1,703 iTrader: 3 reviews	Can a starter be weak?.. I would test the starter too __________________ 01 GT. 5spd , 03-04 cobra clutch, on its 2nd 4.6l motor2nd tr3650 too,JLT CAI,UPR o/r x, magnapack catback, predator tuned, H&R ss 10.5" bullitts w/ nt555r DR's

February 6th, 2012, 08:03 PM	#11
cschoening09 Hardcore Enthusiast 2001 Mustang GT 9.30 @ 77mph-1/8th mile 2.2 60' Join Date: Oct 2010 Location: Council Bluffs, IA Posts: 1,703 iTrader: 3 reviews	Kinda sounds like a maf sensor issue? Try cleaning it with maf cleaner from parts store. __________________ 01 GT. 5spd , 03-04 cobra clutch, on its 2nd 4.6l motor2nd tr3650 too,JLT CAI,UPR o/r x, magnapack catback, predator tuned, H&R ss 10.5" bullitts w/ nt555r DR's

February 6th, 2012, 08:06 PM	#12
duvaltom Regular 1992 Lx hatch Join Date: Sep 2011 Location: Suffield Posts: 105 iTrader: 0 reviews	Starter is actually new, most everything is from the build, and a dirty maf sensor? what would this do if dirty?

February 6th, 2012, 08:07 PM	#13
Troy5.0 Newbie 1988 mustang LX Join Date: Jul 2010 Location: Aylmer Posts: 41 iTrader: 0 reviews	i had trouble with the idle going from 200 to 1200 rpm i cleaned the IAC valve it worked for abit then i just ended up buying a new one and i havent had the problem since. but i didnt have the back fire problem that could be a faulty O2 sensor.

February 6th, 2012, 08:21 PM	#15
duvaltom Regular 1992 Lx hatch Join Date: Sep 2011 Location: Suffield Posts: 105 iTrader: 0 reviews	so dirty maf or dirty IAC ile check them bolth in the morning deffinatly,

February 6th, 2012, 08:37 PM	#16
cschoening09 Hardcore Enthusiast 2001 Mustang GT 9.30 @ 77mph-1/8th mile 2.2 60' Join Date: Oct 2010 Location: Council Bluffs, IA Posts: 1,703 iTrader: 3 reviews	Good deal. Let us know. __________________ 01 GT. 5spd , 03-04 cobra clutch, on its 2nd 4.6l motor2nd tr3650 too,JLT CAI,UPR o/r x, magnapack catback, predator tuned, H&R ss 10.5" bullitts w/ nt555r DR's

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February 6th, 2012, 08:38 PM	#17
cschoening09 Hardcore Enthusiast 2001 Mustang GT 9.30 @ 77mph-1/8th mile 2.2 60' Join Date: Oct 2010 Location: Council Bluffs, IA Posts: 1,703 iTrader: 3 reviews	You may have to have a safety torch bit to get maf sensor off. Not sure though. Mine does but it's an 01 __________________ 01 GT. 5spd , 03-04 cobra clutch, on its 2nd 4.6l motor2nd tr3650 too,JLT CAI,UPR o/r x, magnapack catback, predator tuned, H&R ss 10.5" bullitts w/ nt555r DR's

February 6th, 2012, 08:48 PM	#18
duvaltom Regular 1992 Lx hatch Join Date: Sep 2011 Location: Suffield Posts: 105 iTrader: 0 reviews	no i had it off once befor cuz i bought the maf used on cl,

February 6th, 2012, 10:31 PM	#19
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Dude, if you have a voltage issue, then it's nothing with your sensors. Check all your power connections and ground connections. If everything looks good there, then take your alternator to a different place to get checked. Sometimes the kids at autozone don't know what they are doing. __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

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