408 Random Revs
11-26-2010, 04:52 AM
#1
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408 Random Revs here we go....
i have a 408 iron block i just put in my car. its has maybe ten miles on it. I had the comp flashed so i could run the car, but it was too rich for my liking so i brought the car to the tuner, and he base tuned the 408 on the dyno.
i drove the car yesterday but only for a very short distance and it drove fine idled fine and everything.
drove the car today to my parents for thanksgiving, and two blocks from my house the car, i put the car in neutrul and it started to rev up like the throttle stuck or something so i tap the throttle but it doesn't lower the revs. i shut the car off and pull over.
i play a little with the idle screw and i get the car to idle in neutrul at 1500 rpm. drive it to my parents
go to drive home and same thing. i keep getting these random revs where ill be driving and then put the clutch in and it wants to raise to 3000 rpms and i shut the car off. on the way home i just got it there as quick as possible and turning onto my street i put it in 2nd and it reved up and it was like pushing through the brake.
just wondering what would cause a rev like that. the cam isnt that big in the 408 so i dont know. is it a tune issue. the tune is SD. please any help is needed. and if you read this far.....Happy Thanksgiving...
i have a 408 iron block i just put in my car. its has maybe ten miles on it. I had the comp flashed so i could run the car, but it was too rich for my liking so i brought the car to the tuner, and he base tuned the 408 on the dyno.
i drove the car yesterday but only for a very short distance and it drove fine idled fine and everything.
drove the car today to my parents for thanksgiving, and two blocks from my house the car, i put the car in neutrul and it started to rev up like the throttle stuck or something so i tap the throttle but it doesn't lower the revs. i shut the car off and pull over.
i play a little with the idle screw and i get the car to idle in neutrul at 1500 rpm. drive it to my parents
go to drive home and same thing. i keep getting these random revs where ill be driving and then put the clutch in and it wants to raise to 3000 rpms and i shut the car off. on the way home i just got it there as quick as possible and turning onto my street i put it in 2nd and it reved up and it was like pushing through the brake.
just wondering what would cause a rev like that. the cam isnt that big in the 408 so i dont know. is it a tune issue. the tune is SD. please any help is needed. and if you read this far.....Happy Thanksgiving...
11-27-2010, 01:11 AM
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how do i reset the TPS. do you mean unplug turn the ignition on and then turn it off and then plug it back in? also should i just get a new TPS sensor, but i think its the tune...
Last edited by DGageSS; 11-30-2010 at 09:21 PM.
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11-27-2010, 02:07 AM
#8
I recently had my new 403 tuned at Newtech and it wasn't quite as bad as yours but it surged like a **** at a stop once hot and would throw the same codes (This is before I hit 500 miles and couldn't get a full tune). Turned out we didnt have the MAF wired up correctly. Maybe yours isn't wired up correctly, burned up, faulty? And yes that is how you rest your TPS
11-27-2010, 02:10 AM
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so im gonna check the sensor out and buy one probably. how was your final tune GTOworship?? and im sd tune and i dont know how i wouldnt have it hooked up correct, isnt there only one way it can plug in....
11-27-2010, 02:20 AM
#11
Now that I have the full tune on my car and the MAF is working, my car runs like a champ (despite my tranny being on its last legs
)