used unleaded instead of premium.

[gtrGhosTDoGG11]

Check all your pipes in the engine bay, make sure they are all connected. Maybe a vacumm pipe has been knocked out and causing the idle problem.

Worth a try.

[The Dan]

None of this should ever happen. Your knock sensors should sense detonation and retard timing. All running lower octane fuel will ever do it cause the engine to run slightly slower. The pre-ignition involved in a 4-6 ron octane change is totally insignificant when you are talking about making an engine go backwards. This would never happen. As for cracking ring lands, unless you are running borderline timing figures and something stuffs up in your fuel system ie. reg lets go or pump stops then regular is not going to crack ring lands either.

As for your gurgling popping noise when downshifting...did you set the TPS up right after removing it? if not and you have it set right on the switch point, it will cause it to run like shit. Check for any intake leaks by blocking the hose (crimp it) to your blowby control valve....if the idle drops then you have no intake air leaks, if it stays the same...start looking. How did the old plugs look? can you give a VERY accurate description of the colour of the insulated electrode or the negative electrode or outer case?

[LastTemptation]

the plugs are good, i changed them 8000 ago and ive cleaned them up and swapped them over. i would like to try out someone else's TPS out. I think this might be the problem. ive already cleaned it out wit carby cleaner.. hasnt done much. it could just be stuffed.

[LastTemptation]

guys im still stuck with this problem.. anyone have any more ideas, im trying to solve with without taking it to the mechanics..

[DOUGMO]

I Have This Prob In An R32 Also

[The Dan]

Did you check and clean the AFM?

[LastTemptation]

did that.. car hasnt been driven much, it bugs me to much reving in traffic

[warriorbrawl]

Try doing a compression test.

my 180 was behaving weird checked everything then did the test, piston 4 was cracked.

[Cefiro_PWA]

i had the same problem with my cefiro before i sold it..

i think it was a dodgey fuel pump causing the popping and the idle was mostly because it was never serviced for 1 year.