car hesitating - 3000GT/Stealth International Message Center

jay04 · 05-03-2008, 12:15 PM

my car hesitates at low throttle just cruising. It doesnt when i get on it. I didnt find any boosts leaks. Tuning is good. It doesnt do it when i am at wot. What could it be?

Also my oil cap leaks really bad. Could that be the problem? I replaced the oil cap with a OReillys one so i think thats fixed. Although i think it still leaks. Maybe it just the old oil that spilled before.

Mike1992 · 05-03-2008, 02:36 PM

I have this problem to, still cant figure it out

mywetdream · 05-03-2008, 04:21 PM

well i would pressure test it for starters....what kind of condition are your plug wires/spark plugs in? check your ECU for any fried caps on it..which is common for the early years...clean your Mass air flow sensor..with the right spray..

Mike1992 · 05-03-2008, 04:24 PM

Quote:

Originally Posted by mywetdream

well i would pressure test it for starters....what kind of condition are your plug wires/spark plugs in? check your ECU for any fried caps on it..which is common for the early years...clean your Mass air flow sensor..with the right spray..

Pressure Test Done
New MSD OEM Boot Style Wires and Copper NGK's @.30
Tryed 2 ECU's, both have good caps
Cleaned Mas and changed it with a spare, no change

mywetdream · 05-03-2008, 04:27 PM

Quote:

Originally Posted by Mike1992

Pressure Test Done
New MSD OEM Boot Style Wires and Copper NGK's @.30
Tryed 2 ECU's, both have good caps
Cleaned Mas and changed it with a spare, no change

ok...well how bout your coil pack? i have read and seen where that can cause issues...as well as your Throttle position sensor....

Mike1992 · 05-03-2008, 04:46 PM

Quote:

Originally Posted by mywetdream

ok...well how bout your coil pack? i have read and seen where that can cause issues...as well as your Throttle position sensor....

Beleive it or not, but I've swapped those with spares also. No change. I have a thread going on this as well.
Mysterious Lean Spikes and Hesitation

Phattlard · 05-20-2008, 05:28 PM

bro I have the same problem, This car has done it since i owned it. Even after engine rebuild. Pressure tested the crap out of it many times, fixed TINY leaks, now there is none, it holds 15 psi for minutes before dropping. I have new plug wires, plugs, fuel filter and pump. Its annoying as hell. Even in neutral the engine misses while giving it the slightest throttle . I have tested electrical sensors. One thing that clears it up tho, if I run the CAR with NA intake piping, no hesitation. hmmm

chrisincobb · 05-20-2008, 05:46 PM

i had similar probelms with mine. i used the sea foam treatment, and now it idles flat, and no stalls or sputters at any rpm. you might as well give it a try, since its cheap and your top end might need a cleaning.

05-03-2008, 12:15 PM	#1 (permalink)
jay04 Wrks on car btwn classes Join Date: Nov 2004 Location: South Carolina Drives: 1993 3KGT VR4 Trader Rating: (7)	car hesitating my car hesitates at low throttle just cruising. It doesnt when i get on it. I didnt find any boosts leaks. Tuning is good. It doesnt do it when i am at wot. What could it be? Also my oil cap leaks really bad. Could that be the problem? I replaced the oil cap with a OReillys one so i think thats fixed. Although i think it still leaks. Maybe it just the old oil that spilled before.

05-03-2008, 02:36 PM	#2 (permalink)
Mike1992 DSM GURU Join Date: Apr 2007 Location: Springfield, Mo Drives: 91 Stealth RT/TT Trader Rating: (26)	Re: car hesitating I have this problem to, still cant figure it out __________________ 1992 Mitsubishi 3000GT VR-4 RIP 3/06 1990 Eagle Talon TSI AWD - 11.29@126 - SOLD 1991 Dodge Stealth RT/TT - Traded 1992 Eagle Talon TSI AWD - Where fast really is cheap

05-03-2008, 04:21 PM	#3 (permalink)
mywetdream Oh SNAP!!! Join Date: Jun 2004 Location: colorado Drives: 94 TT, 69 427 vette Trader Rating: (19)	Re: car hesitating well i would pressure test it for starters....what kind of condition are your plug wires/spark plugs in? check your ECU for any fried caps on it..which is common for the early years...clean your Mass air flow sensor..with the right spray.. __________________ If you feel I have answered your question..leave me some rep...thanks 1ST place RMG 07 best engine Like the snake the BITE must be felt and not seen, goin super, until then super slow want some!!! 1st car with the Enkei RZ-5 18''x8.5'' 534x306 1994 Dodge Stealth R/T TT~Pearl Yellow

05-20-2008, 05:28 PM	#7 (permalink)
Phattlard Wrench Pimp Join Date: Nov 2005 Location: NY Drives: 93 Base, 91 VR4 Trader Rating: (4)	Re: car hesitating bro I have the same problem, This car has done it since i owned it. Even after engine rebuild. Pressure tested the crap out of it many times, fixed TINY leaks, now there is none, it holds 15 psi for minutes before dropping. I have new plug wires, plugs, fuel filter and pump. Its annoying as hell. Even in neutral the engine misses while giving it the slightest throttle . I have tested electrical sensors. One thing that clears it up tho, if I run the CAR with NA intake piping, no hesitation. hmmm __________________

05-20-2008, 05:46 PM	#8 (permalink)
chrisincobb Me=yellow You=purple Join Date: Feb 2008 Location: Rakes are needed. Drives: SHORT DISTANCES Trader Rating: (2)	Re: car hesitating i had similar probelms with mine. i used the sea foam treatment, and now it idles flat, and no stalls or sputters at any rpm. you might as well give it a try, since its cheap and your top end might need a cleaning.

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