Wierd situation....help
Thread Starter
Safety Car
Joined: Jul 2003
Posts: 4,928
Likes: 1
Wierd situation....help
This was happening for a while but had gone away. Now the problem has occurred again. As I'm accelerating from a stop, under medium throttle the car all of the sudden studders as if it's not firing right. Give it some more throttle and it recovers. It usually happens in first or second gear and only under medium throttle (1/2-3/4).
My thoughts are:
Fuel pump going bad
Clogged fuel filter
Throttle position sensor needs adjustment
ignition problem?
timing needs adjustment
Anyone have this problem or know of this problem? Am I headed in the right direction with any of the above ideas? Thanks for the help.
My thoughts are:
Fuel pump going bad
Clogged fuel filter
Throttle position sensor needs adjustment
ignition problem?
timing needs adjustment
Anyone have this problem or know of this problem? Am I headed in the right direction with any of the above ideas? Thanks for the help.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
If the fuel filter has not been changed in while, try that. Also cleaning the TB/IAC is a good suggestion. The fuel pump usually fails when the demand is most, but still a possibllity. Also check the TPS voltage.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Fuel is easily checked. Duct tape a pressure guage to the window and watch it when the car has a fit. If the pressure drops, you will confirm a pump, filter, or collapses sock type of problem. If the guage stays rock solid, I would troubleshoot ignition next. When they freak out under load, it is usually ignition, followed by fuel.
Instructor
Joined: May 2006
Posts: 153
Likes: 0
From: Gautier MS
Originally Posted by elefkow
Being lazy and not having a ton of time, I go for the easiest first. Try a can of SeaFoam and follow the directions. If that doesn't work, change the fuel filter and go from there.
Thread Starter
Safety Car
Joined: Jul 2003
Posts: 4,928
Likes: 1
I'll try cleaning the TB/IAC although I did that about 10k miles ago. I just changed the oil and don't want to do the seafoam until I need to change it again. I do need to put a set of sparkplugs in. If it is ignition, could it be just plugs or would there be something else?
Thread Starter
Safety Car
Joined: Jul 2003
Posts: 4,928
Likes: 1
Originally Posted by Sleeper90
This would be a easy first step. Kind of ,to me, sounds like your not receiving the air or sticky throttle when accelerating from a stop. Stumble.
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Instructor
Joined: May 2006
Posts: 153
Likes: 0
From: Gautier MS
Originally Posted by 89Corvette6spdFX3
Wouldn't I feel the sticky throttle in the pedal?
with elekow, $6 can of SeaFoam...and I never add it to my oil, been using it for 10-15 years.
Thread Starter
Safety Car
Joined: Jul 2003
Posts: 4,928
Likes: 1
Plugs are AC's possibly even origional. The car has 84k miles on it. The pedal doesn't feel sticky at all so I really don't think it's the TB.
When it happens, it feel like it's being starved for fuel, but I'm just not sure. I need to try the pressure guage test, although it doesn't always do it so I never know when it's going to happen. When I try to replicate the take off to recreate the occurance, it doesn't do it. I dunno??
When it happens, it feel like it's being starved for fuel, but I'm just not sure. I need to try the pressure guage test, although it doesn't always do it so I never know when it's going to happen. When I try to replicate the take off to recreate the occurance, it doesn't do it. I dunno??
Melting Slicks
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Originally Posted by 89Corvette6spdFX3
I'll try cleaning the TB/IAC although I did that about 10k miles ago. I just changed the oil and don't want to do the seafoam until I need to change it again. I do need to put a set of sparkplugs in. If it is ignition, could it be just plugs or would there be something else?
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by 89Corvette6spdFX3
How would I determine if it is the ignition module? Guess now, I could get one of those high power ones from Ecklers eh?
