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Hesitation when Throttle Applied


Hittman
my title is ghey


Galant VR-4 org Post #: 847161 posted 11/06/09 08:21 AM     Remind Me!  Send Private Message   Edit Post      
I've searched a couple of terms and found some threads, but none applied to me (or at least they didnt seem to)

I'm having a problem with hesitation when throttle is applied, upon lessening up on the throttle, it seems that the car accelerates a bit more. This appears to be evident in 1st through 3rd gear, but seems to taper off in 4th and 5th. I had a similar problem in my Evo, but it turned out to be a loose hose (I/C Piping Hose), didnt know if thats where I should start on this issue, or if this sounds like a different problem. Any help is appreciated.



JDM e39a


Edited by Hittman (11/06/09 08:22 AM)

Posts: 464 | From: Northern VA | Member Since: 09/11/09 | IP: (173.13.197.218) | Report this post to a Moderator

Hittman
my title is ghey


Galant VR-4 org Post #: 847173 posted 11/06/09 09:16 AM     Remind Me!  Send Private Message   Edit Post      
BTW Stock engine, no mods. I've read that maybe something to do with a bad FPR Diaphram? or faulty injectors (which might make sense of why different gears are affected)?



JDM e39a

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Qship
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Galant VR-4 org Post #: 849285 posted 11/13/09 12:57 AM     Remind Me!  Send Private Message   Edit Post      
Could also be knock pulling the timing. A bad TPS, or something in the MAS. Some more info would be useful; the easiest way to diagnose this would be to use a datalogger; is there one near you that you could use?

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Andy_S
Overcomplicated


Galant VR-4 org Post #: 849328 posted 11/13/09 09:05 AM     Remind Me!  Send Private Message   Edit Post      
Timing could also get pulled if the knock sensor is bad. Check that.



I found v8's...

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Hittman
my title is ghey


Galant VR-4 org Post #: 849336 posted 11/13/09 09:20 AM     Remind Me!  Send Private Message   Edit Post      
Sorry for the vague description.


Its getting worse now, 1st gear is the main culprit. It seems when I engage into first gear, i have almost NO power. The engine revs, but the car doesnt seem to "catch". (similar to when my Evo blew off an I/C pipe)

I havent checked the TPS yet, but will follow suit and check the knock sensor as well as the MAS.



JDM e39a

Posts: 464 | From: Northern VA | Member Since: 09/11/09 | IP: (173.13.197.218) | Report this post to a Moderator

Hittman
my title is ghey


Galant VR-4 org Post #: 849337 posted 11/13/09 09:23 AM     Remind Me!  Send Private Message   Edit Post      
I dont personally own a datalogger, but will be seeing someone this weekend that has one. Hopefully we will be able to solve this issue.

Also, something else I noticed. I know our cars are known for noisy lifters, but it seems that this problem is evident when the lifters are noisy. When the lifters quiet down, the problem seems to dissipate.



JDM e39a

Posts: 464 | From: Northern VA | Member Since: 09/11/09 | IP: (173.13.197.218) | Report this post to a Moderator

Hertz Galant VR4.org Administrator
OneTitle to rule them all.
77/2000


Galant VR-4 org Post #: 849386 posted 11/13/09 12:22 PM     Remind Me!  Send Private Message   Edit Post      
Running mega rich.



Ryan Hertz

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Hittman
my title is ghey


Galant VR-4 org Post #: 849393 posted 11/13/09 12:43 PM     Remind Me!  Send Private Message   Edit Post      
Thanks Hertz. Are there any common GVR4 malfunctions that would cause this? (Sensors, etc.)



JDM e39a

Posts: 464 | From: Northern VA | Member Since: 09/11/09 | IP: (173.13.197.218) | Report this post to a Moderator

Qship
Unregistered


Galant VR-4 org Post #: 849427 posted 11/13/09 02:43 PM     Remind Me!  Send Private Message   Edit Post      
Could be torn fpr diaphragm, fouled plugs, faulty coolant temp sensor. Or it could just be noisy lifters reading as knock and pulling timing.

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Hittman
my title is ghey


Galant VR-4 org Post #: 849442 posted 11/13/09 03:11 PM     Remind Me!  Send Private Message   Edit Post   
Awesome Thanks for the Help. I will check on these this weekend. I appreciate everyone's help thus far, this site is filled with knowledgeble people who are actually WILLING to help... !!



JDM e39a


Edited by Hittman (11/13/09 03:12 PM)

Posts: 464 | From: Northern VA | Member Since: 09/11/09 | IP: (173.13.197.218) | Report this post to a Moderator


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