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Poor half throttle response when warm?
Thread Starter
Cruising
Joined: Aug 2007
Posts: 11
Likes: 0
Poor half throttle response when warm?
Hi folks, I have 88 (auto) vette with all the cheap mods, TPS sensor 0.58v, ignition timing 6 BTDC and TV cable adjusted.
On mornings when the car is in open loop it feels truly alive and crisp. Half throttle response is amazing but when it warms it loses the crispness. What could be causing this? When engine warm it feels that it only has 2 modes: WOT or cruise. If you try to accelerate with half throttle pedal play, it has very little response.
Also when shifting from 2nd to 3rd in half throttle it feels like rubber band sometimes. Rpms drop and I have to push the pedal more to keep the speed. No issue when WOT accelerating?
But as I said, when cold the car acts like a champ. Any idea?
On mornings when the car is in open loop it feels truly alive and crisp. Half throttle response is amazing but when it warms it loses the crispness. What could be causing this? When engine warm it feels that it only has 2 modes: WOT or cruise. If you try to accelerate with half throttle pedal play, it has very little response.
Also when shifting from 2nd to 3rd in half throttle it feels like rubber band sometimes. Rpms drop and I have to push the pedal more to keep the speed. No issue when WOT accelerating?
But as I said, when cold the car acts like a champ. Any idea?
Thread Starter
Cruising
Joined: Aug 2007
Posts: 11
Likes: 0
Hmm, the EGR has been removed over 3-4 years ago when I did most of my cheap mods (ported plenum, airfoil, coil, wires etc..).
I feel thou that the problem has been gradually but very sloowly building, thus I have not noticed it before.
But nowdays the difference between cold car and warm car is too obvious. I want it to behave like the cold car all the time *weep*
Also front cats are removed and only high flow main cat. So there should be no blockade in the exhaust.
I feel thou that the problem has been gradually but very sloowly building, thus I have not noticed it before.
But nowdays the difference between cold car and warm car is too obvious. I want it to behave like the cold car all the time *weep*
Also front cats are removed and only high flow main cat. So there should be no blockade in the exhaust.
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
You should buy one. You're missing out on a ton of valuable info. Worth every penny.
See "lack of power, sluggish, or spongy" at part throttle below.
Also, take care of that intermittent code 32.
Click on the texts below.
Symptoms
Code 32
If you can't view the link documents, download this:
http://www.adobe.com/products/acrobat/readstep2.html
See "lack of power, sluggish, or spongy" at part throttle below.
Also, take care of that intermittent code 32.
Click on the texts below.
Symptoms
Code 32
If you can't view the link documents, download this:
http://www.adobe.com/products/acrobat/readstep2.html
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Thread Starter
Cruising
Joined: Aug 2007
Posts: 11
Likes: 0
thanks, valuable information 
It is starting to look like EGR related issue. Usually the EGR code will pop up when car has warmed up and usually when I am steadily cruising on highway for long time.
Other possible issue could be the fuil filter. I have driven around 22 000 miles after last fuel filter change.
It is starting to look like EGR related issue. Usually the EGR code will pop up when car has warmed up and usually when I am steadily cruising on highway for long time. Other possible issue could be the fuil filter. I have driven around 22 000 miles after last fuel filter change.
