Few Problems

[GTI-R Nath]

Im having 2 small problems with my car, and wondering if anyone could give any advice on what the think it might be.

1st problem is if the car is idling, and i gently touch the accelerator pedal, the idel will blip and drop to 700-800, but if i push pedal slightly harder it will rev fine? (this only happens when the cars cold)

2nd problem is if im driving on a motorway and am in 5th gear at the same speed for a long period, then when i drop back down to 3rd or 4th and try to floor it, the car will either take 5 to 10 second to take off, or will feel like its down on power, for a few minutes then start to drive fine again? thinking this might be a slipping clutch but not 100%

 

[PulsarLee]

Have you done a fault code check

34?

mine is the same on cold idle

but ive got code 34 and knackered idle control valve

 

[GTI-R Nath]

i pretty much do a fault check after every drive in my car, lol, and i always get 55, but the knock sensor is probably the only sensor i haven't replaced, and i have recently takent off the idle control valve and cleaned all the shit out of it aswell....

 

[Fusion Ed]

Sounds like TPS is not setup right.

 

[PulsarLee]

Just out of interest........... if the idle control valve dosent have an electrical feed to it, what would this affect once the engine is warmed up? I thought it only adjusted the idle from cold?

Thanks,

Lee

 

[GTI-R Nath]

Sounds like TPS is not setup right.

yeah was looking at the setting throttle position sensor guide tonight, the pictures aren't there anymore, but i think i get the general idea, was also thinking about reground the MAF but i would probably get fault code if there was anything wrong with the MAF??

 

[PobodY]

Not necessarily; if the MAF is still giving a valid signal, I don't think that registers as a fault. There's no harm in re-earthing it, and it's a pretty quick and easy job.
I think we're going to need to make a new photo for that how-to procedure for the TPS.

@Lee: I think you're right. If there is no power feed the solenoid doesn't open to give you the fast idle from cold, but that should make no difference to a warm engine as you don't want the fast idle.

 

[vss irvine]

check the plug connectionand wiring to the afm, if its not a good connection it woud cause these issues. do yo have a z32?

if so check the connections to the new plug.

also set the tps and clean the maf.

this guide is pretty simple to use

http://plmsdevelopments.com/sr_setup_tips.shtml

 

[Fusion Ed]

Unplug the TPS and see how it affects operation. They default open. Simply put pretty much the only thing the TPS does is control fuel cut over run, a bit of fuel enrichment, and to let the ecu know it should expect to idle.

 

[GTI-R Nath]

set the the TPS too 0.45 and reground the MAF today and cars running great now, thanks for the help