Idle Surge, Accelerating on its Own!

[joeym4130]

Well, I've checked most of those things on the faq checklists before, diagnosed from many links..this has been an ongoing problem... but tonight i just found something new. I pulled the ECU a while back to check also, and it was fine.

Well like i said the idle surges from 1100-1500... but tonight i was driving and if I let off the accelerator, and coast in gear ( i was in 2nd) and coast until the RPMs hit that 1100 mark, the car will accelerate by itself for a few seconds, then stop, then accelrate, then stop...etc... remarkebly in a range like the surge!!!!!!!! Very Exciting for me to notice!! Hmmm...is it my TPS?? It tested ok, but I know tests are always decieving...(My friend had a ISC he thought was good bc it checkout out electically but the pintle never moved right) Any ideas?? I hope this is the final clue for at least one of my problems haha....

 

[jérôme]

ive got the same problem.
im pretty sure its my ecu, since i swapt it and the problems went away, but things got more confusing, when that ecu failed on me...
try swapping it out with a friends for a day..
let me know what it is.
jerome

 

[jérôme]

... but now im leaning towards the isc...
any progress with you?

 

[joeym4130]

Hey
No, nothing yet I am going to try an ECU swap. I just have to find someone to swap with . The ECU appears in good shape, but someone on the board told me there is always a chance it isnt and that makes sense. If it fixes it I'll post it up. Crossing my fingers.. .

 

[JessesTalon]

I gots the samae problem

my ISC is the problem though


try unplugging your ISC and make sure you have no air leaks (from your BISS or make sure your recirculating, and you intake has no holes.

with the ISC unplugged you can still get a decent idle (around 1000) and at least its not surging.

 

[jérôme]

ill try that.
does it make you stall when you turn the wheel(power steering...)
how are cold start ups?
no bucking?

 

[JessesTalon]

Originally posted by jérôme
ill try that.
does it make you stall when you turn the wheel(power steering...)
how are cold start ups?
no bucking?

no if im moving, yes(little bit) if i just started my car and i turn the wheel hard while not moving...

no

and no