What is causing this GTO to run slower?
On The Tree
Joined: Aug 2012
Posts: 190
Likes: 0
Did you ever check the fuel pressure at the rail? His pump could be in its way out. If y'all have identical cars, maybe try swapping mafs/coils/TBs/PCM, one at a time and see if you can eliminate any of those things.
TECH Addict
Joined: Aug 2005
Posts: 2,305
Likes: 126
From: Monroe,NY
When you first step on it the car sounds like it is missing until it gets up in rpms.
Check fuel pressure, coils could be weak and take valve covers off and check rockers and springs. DO you have any tuning software?
Check fuel pressure, coils could be weak and take valve covers off and check rockers and springs. DO you have any tuning software?
Last edited by gagliano7; Feb 11, 2014 at 08:21 AM.
Teching In
Joined: Jan 2014
Posts: 23
Likes: 0
Wonder if its a knock sensor retarding timing
04 GTO IBM A4. 1 of 273. 1 7/8 pacesetter long tubes. Pacesetter 3" catless mids. SLP LM2 catback. Vigilante 4500. B&M supercooler. IPS motorsports Dyno tuned @352/350
04 GTO IBM A4. 1 of 273. 1 7/8 pacesetter long tubes. Pacesetter 3" catless mids. SLP LM2 catback. Vigilante 4500. B&M supercooler. IPS motorsports Dyno tuned @352/350
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Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 327
Likes: 1
Funny you mentioned tuning. Just asked on the tuning forum if there is a way to de-tune or restore to factory settings on the Tech2. No one has replied yet. Reason i ask is cz im starting to think the first owner might have tuned the car. The 2nd owner then replaced the motor. And now the 3rd owner has a car that is tuned for another engine. Love to know if there is that option on the Tech 2.
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 327
Likes: 1
Heard you loud and clear the first and second time buddy. And i replied to you. As much as i would love it to be just a simple throttle-not-fully-opening issue...saying its a throttle issue over and over isn't miraculously going to make it so.
I told you why i don't think its due to the throttle not opening fully. If my reasoning is flawed...then plz do EXPLAIN why you think so...instead of just saying the same thing repeatedly.
I told you why i don't think its due to the throttle not opening fully. If my reasoning is flawed...then plz do EXPLAIN why you think so...instead of just saying the same thing repeatedly.
Launching!
Joined: Jul 2009
Posts: 222
Likes: 0
From: Durham, NC
Heard you loud and clear the first and second time buddy. And i replied to you. As much as i would love it to be just a simple throttle-not-fully-opening issue...saying its a throttle issue over and over isn't miraculously going to make it so.
I told you why i don't think its due to the throttle not opening fully. If my reasoning is flawed...then plz do EXPLAIN why you think so...instead of just saying the same thing repeatedly.
I told you why i don't think its due to the throttle not opening fully. If my reasoning is flawed...then plz do EXPLAIN why you think so...instead of just saying the same thing repeatedly.
You can still achieve redline with a throttle that is say, 75% open.
You'll need a scanner to verify the TPS is at 100%.
It sounds like the car needs to have a log of a couple of runs to see how things are acting.
Good Luck.
TECH Addict
Joined: Mar 2013
Posts: 2,628
Likes: 30
Heard you loud and clear the first and second time buddy. And i replied to you. As much as i would love it to be just a simple throttle-not-fully-opening issue...saying its a throttle issue over and over isn't miraculously going to make it so.
I told you why i don't think its due to the throttle not opening fully. If my reasoning is flawed...then plz do EXPLAIN why you think so...instead of just saying the same thing repeatedly.
I told you why i don't think its due to the throttle not opening fully. If my reasoning is flawed...then plz do EXPLAIN why you think so...instead of just saying the same thing repeatedly.
TECH Addict
Joined: Mar 2013
Posts: 2,628
Likes: 30
Get in the car and put the throttle down and have someone check that the plate opens to 100%. Instead anything anyone posts up to help you have some BS excuse why it can't be.....Ya gotta start someplace DOOD fer Christ sakes
WHy do I waste my time posting............
WHy do I waste my time posting............
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 327
Likes: 1
I think he keeps asking if the PCM recognizes that the throttle blade is opening fully, ie, verifying that the TPS is at 100% when the throttle pedal is to the floor and then to verify that the blade is actually open at 100%.
You can still achieve redline with a throttle that is say, 75% open.
You'll need a scanner to verify the TPS is at 100%.
It sounds like the car needs to have a log of a couple of runs to see how things are acting.
Good Luck.
I will definitely get that checked.
TECH Addict
Joined: Mar 2013
Posts: 2,628
Likes: 30
lmao @ this thread. It is some kind of weak if he can mat it with TC off and not spin a lick. Holy crap. Id be in the ditch or roasting second/third at redline, sideways down the road...
TECH Addict
Joined: Mar 2013
Posts: 2,628
Likes: 30
The floor mat is probably folded under the gas pedal............or hes just too short to reach WOT...................HAHAHAHAHAHA
TECH Addict
Joined: Aug 2005
Posts: 2,305
Likes: 126
From: Monroe,NY
I don't know anything about the tech 2 but can you monitor everything with it?( I would sure hope so) I am sure the tech 2 can reset your tune since some people have went to the dealer with a tune and the dealer upgraded the pcm and they lost there tune.
I have hptuners and you can just about monitor everything to find the problem.
I have hptuners and you can just about monitor everything to find the problem.