Stumbling problem part 2...

WhiteMamba · September 2nd, 2010, 10:42 PM

As some of you have read my car was having a misfire issue spontaneously. Some days I thought i might have even fixed it but the son of a bitch is still here.

My turbo kit goes on this weekend and I need to give this one more shot.

The good and bad news is that the problem is getting worse the last few days. When the car is cold it barely runs and misses bad all over the place. Once it warms up it seems to clear but still runs rough at part throttle and seems good at WOT but has an occasional miss at WOT.

Sometimes the idle is smooth but the last few days it has been hunting a little bit.

Codes it is throwing are all EGR related (and my EGR has been deleted)

I have replaced the following:

Spark Plugs/Wires

Ignition Coil

IAC

Ignition Module

02 sensors

Checked grounds (as best I could)

The turbo kit comes with 44lb injectors and calibrated MAF. The car will also get a MSD 6AL at this time.

I'm hoping one of those turbo components will fix my issue.

What are the odds of it being the distibutor or PCM? Could it be the TPS?

Anybody have any thoughts before the turbo goes on?

Thanks!

fogged306 · September 2nd, 2010, 10:44 PM

Do you have a vacuum gauge? I would check your vacuum at idle.

WhiteMamba · September 2nd, 2010, 10:54 PM

Originally Posted by fogged306

Do you have a vacuum gauge? I would check your vacuum at idle.

no but i can get one...where do i check vaccum at?

fogged306 · September 2nd, 2010, 10:58 PM

Just pull a vac line off the tree for something like your heat controls or your cruise and hook up the vac gauge to that.

Courtesy of Joel

WhiteMamba · September 2nd, 2010, 11:02 PM

Originally Posted by fogged306

Just pull a vac line off the tree for something like your heat controls or your cruise and hook up the vac gauge to that.

Courtesy of Joel

Just plug into any of the plugged lines on the tree? I will pick up a gauge tomorrow morning.

Anything else i should try?

WhiteMamba · September 2nd, 2010, 11:03 PM

Do I let the motor get to normal temp first?

FastStang91Lx · September 2nd, 2010, 11:06 PM

Air temp sensor on the intake runner, and coolant temp sensor for the ecu, not the gauge. The one in the heater tube. Without reading your other thread, I assume you did the base idle reset, and all that jazz?

WhiteMamba · September 2nd, 2010, 11:10 PM

Originally Posted by FastStang91Lx

Air temp sensor on the intake runner, and coolant temp sensor for the ecu, not the gauge. The one in the heater tube. Withought reading your other thread, I assume you did the base idle reset, and all that jazz?

No I did not do the base idle reset. Link?

fogged306 · September 2nd, 2010, 11:12 PM

It's a sticky in this section.

Uber88GT · September 2nd, 2010, 11:12 PM

its a sticky in this forum....

edit - dammit too slow!

WhiteMamba · September 2nd, 2010, 11:26 PM

I will try the idle reset as well tomorro...

Just to clarify...

I connect the vaccum gauge to the air temp sensor once the car is fully warm up? Or do I connect it to the tree?

WhiteMamba · September 2nd, 2010, 11:35 PM

Another thing I have noticed is that I hear an air sound when I pump my brake coming from the pedal...is that normal?

I have read there is a vaccum down there but would that cause my problem?

FastStang91Lx · September 2nd, 2010, 11:36 PM

Originally Posted by WhiteMamba

I will try the idle reset as well tomorro...

Just to clarify...

I connect the vaccum gauge to the air temp sensor once the car is fully warm up? Or do I connect it to the tree?

No... to the tree. I was suggesting sensors to replace... Sorry, I should of quoted to make it clear.

WhiteMamba · September 2nd, 2010, 11:41 PM

Originally Posted by FastStang91Lx

No... to the tree. I was suggesting sensors to replace... Sorry, I should of quoted to make it clear.

any part of the tree? thanks...I will replace those two sensors as well. I already replaced the sensor that control the temp on the coolant gauge...the one with the rubber elbow plug...

WhiteMamba · September 2nd, 2010, 11:48 PM

This is the one I have NOT replaced...is that the one you suggest?

Advance Auto Parts: Coolant Temperature Sensor by BWD - Part WT5058Z

FastStang91Lx · September 2nd, 2010, 11:52 PM

Under construction???

1NVERTED5.0 · September 2nd, 2010, 11:54 PM

you probably have a massive vacuum leak.

WhiteMamba · September 3rd, 2010, 12:01 AM

Originally Posted by 1NVERTED5.0

you probably have a massive vacuum leak.

I feel like that must be it too...where are all the vaccum lines that I should check...keep in mind I have an EGR delete.

DigitalDC89 · September 3rd, 2010, 12:14 AM

that sensor can cause issues as well. if its OEM, its probably worth replacing anyway.

check the vacuum tree for starters. then head to the passenger fender well where the EGR vacuum lines and solenoids were/are. maybe you left one open?

WhiteMamba · September 3rd, 2010, 12:17 AM

Originally Posted by DigitalDC89

that sensor can cause issues as well. if its OEM, its probably worth replacing anyway.

check the vacuum tree for starters. then head to the passenger fender well where the EGR vacuum lines and solenoids were/are. maybe you left one open?

the air temp or the coolant sensor?

September 2nd, 2010, 10:42 PM	#1
WhiteMamba Regular 88 Notch Join Date: Aug 2010 Location: Saint Charles IL Posts: 431 iTrader: 0 reviews	Stumbling problem part 2... As some of you have read my car was having a misfire issue spontaneously. Some days I thought i might have even fixed it but the son of a bitch is still here. My turbo kit goes on this weekend and I need to give this one more shot. The good and bad news is that the problem is getting worse the last few days. When the car is cold it barely runs and misses bad all over the place. Once it warms up it seems to clear but still runs rough at part throttle and seems good at WOT but has an occasional miss at WOT. Sometimes the idle is smooth but the last few days it has been hunting a little bit. Codes it is throwing are all EGR related (and my EGR has been deleted) I have replaced the following: Spark Plugs/Wires Ignition Coil IAC Ignition Module 02 sensors Checked grounds (as best I could) The turbo kit comes with 44lb injectors and calibrated MAF. The car will also get a MSD 6AL at this time. I'm hoping one of those turbo components will fix my issue. What are the odds of it being the distibutor or PCM? Could it be the TPS? Anybody have any thoughts before the turbo goes on? Thanks!

September 2nd, 2010, 11:06 PM	#7
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Air temp sensor on the intake runner, and coolant temp sensor for the ecu, not the gauge. The one in the heater tube. Without reading your other thread, I assume you did the base idle reset, and all that jazz? __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184 Last edited by FastStang91Lx; September 2nd, 2010 at 11:23 PM.

September 2nd, 2010, 11:52 PM	#16
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Under construction??? __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

September 2nd, 2010, 11:54 PM	#17
1NVERTED5.0 Newbie Join Date: Jul 2010 Posts: 29 iTrader: 0 reviews	you probably have a massive vacuum leak. __________________ 1990 Mustang 5.0 Vert' 2009 Nissan GTR

September 3rd, 2010, 12:14 AM	#19
DigitalDC89 Regular '88 Mustang GT Join Date: Apr 2010 Location: Allentown, PA Posts: 463 iTrader: 0 reviews	that sensor can cause issues as well. if its OEM, its probably worth replacing anyway. check the vacuum tree for starters. then head to the passenger fender well where the EGR vacuum lines and solenoids were/are. maybe you left one open? __________________ '02 Mustang GTm Convertible - N/A Cammed Daily '88 Mustang GTm - 1/4 Mile Build - 750rwhp Project '97 Saturn SL2m - Ex-Nitrous Build - Back-Up Daily

September 2nd, 2010, 10:44 PM	#2
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Do you have a vacuum gauge? I would check your vacuum at idle.

September 2nd, 2010, 10:58 PM	#4
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Just pull a vac line off the tree for something like your heat controls or your cruise and hook up the vac gauge to that. Courtesy of Joel

September 2nd, 2010, 11:03 PM	#6
WhiteMamba Regular 88 Notch Join Date: Aug 2010 Location: Saint Charles IL Posts: 431 iTrader: 0 reviews	Do I let the motor get to normal temp first?

September 2nd, 2010, 11:12 PM	#9
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	It's a sticky in this section.

September 2nd, 2010, 11:12 PM	#10
Uber88GT Regular 1988 Mustang GT Join Date: Oct 2009 Location: Edmonton, Alberta, Canada Posts: 456 iTrader: 0 reviews	its a sticky in this forum.... edit - dammit too slow!

September 2nd, 2010, 11:26 PM	#11
WhiteMamba Regular 88 Notch Join Date: Aug 2010 Location: Saint Charles IL Posts: 431 iTrader: 0 reviews	I will try the idle reset as well tomorro... Just to clarify... I connect the vaccum gauge to the air temp sensor once the car is fully warm up? Or do I connect it to the tree?

September 2nd, 2010, 11:35 PM	#12
WhiteMamba Regular 88 Notch Join Date: Aug 2010 Location: Saint Charles IL Posts: 431 iTrader: 0 reviews	Another thing I have noticed is that I hear an air sound when I pump my brake coming from the pedal...is that normal? I have read there is a vaccum down there but would that cause my problem?

September 2nd, 2010, 11:48 PM	#15
WhiteMamba Regular 88 Notch Join Date: Aug 2010 Location: Saint Charles IL Posts: 431 iTrader: 0 reviews	This is the one I have NOT replaced...is that the one you suggest? Advance Auto Parts: Coolant Temperature Sensor by BWD - Part WT5058Z

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