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Posted this in the Tech section but I figured I'll post it here as well...
I will try and describe this as best as I can.. lets say I pull away from a corner after making a turn onto a busy road at normal seed and decide to mash the pedal full throttle....i get a sudden, split second lag, as if it's starving for fuel / air or both, and then it takes off like a bat out of hell.
Any idea what can be causing this. It's driving me nuts as I can't seem to find a cause.
I think in pretty much every DBW car I've been in/around, the one constant that comes to mind is a momentary lag on a sudden sharp throttle opening. I've never seen one have faster throttle response than on a cable actuated car.
Something else you might consider. Get a tuner to go with you and log this event. That will show what is happening and you can get it fixed. Could be that your A/F ratio is messed up and the computer has to compensate briefly until it "figures" it out.
Any recent mods to your car? Did this occur shortly after some mods? How long has thing been happening?
Originally Posted by CactusCat
I'd also make sure my MAF sensor is clean. Also check your air filter and make sure it's clean as well.
No Mods what so ever, Cleaned throttle body / MAF beginning of summer, along with a new AF
Originally Posted by Fastbird
I think in pretty much every DBW car I've been in/around, the one constant that comes to mind is a momentary lag on a sudden sharp throttle opening. I've never seen one have faster throttle response than on a cable actuated car.
That could very well be....it's just annoying. You like to have instant response when you mash the sucker to the floor
There are tons of DBW cars that do not have this momentary lag. My 98 is highly modded (so more of a chance for problems) but there is no lag anywhere, nor was there any lag when it was pure stock. Your problem might be from an injector that is starting to go bad or many other things. That's why it's best to log this event.
Hi SgLou! I haven't actually checked this out on my Vette yet, so I hope I am not too far off base, but I had a recent situation with my DD where the throttle response seemed off. Turns out the TB was filthy. Once I cleaned it with TB cleaner it definitely felt more responsive. Could that be your issue?
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
Originally Posted by donald4972
Is this an A4 car, that is 'shifting down' before you feel the strong pull?
this is what I was thinking... I have a 6 speed and have never had an issue with throttle response, actually it's pretty damn good and smooth in my opinion... any competent tuner should be able to fix any little nuances like that without any fancy "boosters" or add on devices
Hi SgLou! I haven't actually checked this out on my Vette yet, so I hope I am not too far off base, but I had a recent situation with my DD where the throttle response seemed off. Turns out the TB was filthy. Once I cleaned it with TB cleaner it definitely felt more responsive. Could that be your issue?
There are pretty much three components to the DBW setup:
(1) TPS - Throttle Position Sensor on the TB
(2) TAC Module by the PCM passenger inner fender well (go between TPS and Throttle Pedal)
(3) Throttle Pedal Sensor
Make sure that these do not have any moisture or any corrosion on the connections -
Plus make sure there is no moisture and no corrosion on your MAF connection - make this your starting point
If all is good and you have "NO" codes - then your best bet like stated is going to be to DATA Log your Vette, a competent tuner/shop will need to be used to do this -
This should not be happening in a DBW system, especially since NO mods have been made -
Have you cleaned the motor off - carwash, water etc?
There are pretty much three components to the DBW setup:
(1) TPS - Throttle Position Sensor on the TB
(2) TAC Module by the PCM passenger inner fender well (go between TPS and Throttle Pedal)
(3) Throttle Pedal Sensor
Make sure that these do not have any moisture or any corrosion on the connections -
Plus make sure there is no moisture and no corrosion on your MAF connection - make this your starting point
If all is good and you have "NO" codes - then your best bet like stated is going to be to DATA Log your Vette, a competent tuner/shop will need to be used to do this -
This should not be happening in a DBW system, especially since NO mods have been made -
Have you cleaned the motor off - carwash, water etc?
Thanks,Matt
Matt, I have NEVER power washed or used water to clean the engine compartment. I did how ever clean areas of the heads, along intake manifold and around oil filler tube to remove spilled oil from the previous owner using carb. cleaner. I did not use it anywhere near the MAF or TB, but that was in the spring of 2011... I have a stock air intake although i did mod another cover with a series of holes in it for a little better air flow but I don't think that's the problem as I had this throttle response issue before the mod was done and that's what prompted me to clean the TB and MAF with this stuff:
Matt, I have NEVER power washed or used water to clean the engine compartment. I did how ever clean areas of the heads, along intake manifold and around oil filler tube to remove spilled oil from the previous owner using carb. cleaner. I did not use it anywhere near the MAF or TB, but that was in the spring of 2011... I have a stock air intake although i did mod another cover with a series of holes in it for a little better air flow but I don't think that's the problem as I had this throttle response issue before the mod was done and that's what prompted me to clean the TB and MAF with this stuff:
Okay -
What you are going to have to do at this point is get an appointment with a reputable tuner and have him smooth this throttle situation out -
It has happened to others before and it can be corrected -
Just make sure there are no leaks around the manifold or any parts/vacuum lines that have come off - this will also cause the hesitation you are experiencing -
What you are going to have to do at this point is get an appointment with a reputable tuner and have him smooth this throttle situation out -
It has happened to others before and it can be corrected -
Just make sure there are no leaks around the manifold or any parts/vacuum lines that have come off - this will also cause the hesitation you are experiencing -
Throttle response issue, any Idea's ?
