High Revs On Start up
Thread Starter
Pro
Joined: Nov 2003
Posts: 503
Likes: 1
From: Greensboro NC
High Revs On Start up
If my 03 sits for longer than 3 or 4 days it will rev up to 3000 or 4000 rpm
for maybe a second or two on initial start up. It settles to normal after the second or two. It makes no difference if the outside temp is cold or hot. If I drive it every day or two the start ups are normal with no rev ups. It's been doing this since new.
Anyone else experiencing the same?
for maybe a second or two on initial start up. It settles to normal after the second or two. It makes no difference if the outside temp is cold or hot. If I drive it every day or two the start ups are normal with no rev ups. It's been doing this since new.
Anyone else experiencing the same?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The PCM controls throttle angle. When you turn the ignition to ON, the PCM should tell the TAC Module to position the throttle motor to go to the last known proper throttle blade IDLE ANGLE.
When you would normaly expect to see this high idle issue, remove the air ducting between the MAF and Throttle Body. Have someone turn the key to ON and watch the throttle blade. It should power up and errect and go to an idle angle. See what it does when you would expect it to rev up high when started.
Ahter it has its fit, see what the blade does when up first turn it on when it doesnt/ or wouldnt idle high.
You said its done this since new. What year C5 and why didnt the dealer fix it under warranty???
When you would normaly expect to see this high idle issue, remove the air ducting between the MAF and Throttle Body. Have someone turn the key to ON and watch the throttle blade. It should power up and errect and go to an idle angle. See what it does when you would expect it to rev up high when started.
Ahter it has its fit, see what the blade does when up first turn it on when it doesnt/ or wouldnt idle high.
You said its done this since new. What year C5 and why didnt the dealer fix it under warranty???
