revs drop off??? help!

[sigsputnik]

hi all,

i have an auto '89 r32 gtst, just recently off the boat.

i'm finding that when i give it some stick, the revs drop off, then surge again, then drop off, then surge etc etc. eventually the car conks out and i have to restart.

if i'm just driving normally, it appears ok...any ideas what this could be?

any help at all would be great...

sig.

[flagger]

haha sounds exactly like what i had...very very annoying, mine was intermittent too then got worse and worse. turns out it was the AFM (airflow metre). you can find it just after the airbox/pod on the intake pipe. i just got contact cleaner and sprayed the crap out of the element and plugs.

however from what ive read, some of the AFM's are brittle on the inside where the circuit board has to bridge out to the plug and causes problems. if the contact cleaner dont work then either get a new AFM or cut open the existing AFM clean up the contacts on the board and reseal the metre with silicon.

good luck mate. i feel your pain. could be something else too, but AFM is what i would look at first, cause it only takes 20-30 mins

[sigsputnik]

hey thanks heaps flagger - yeah it's ticking me off big time. i'll grab some contact cleaner and give it a go - i guess you remove the airbox, do you then remove the actual afm or just spray down into the guts of it through the metal filter? guessing i have to remove the whole device...

[Bullant47]

Don't use Contact Cleaner to clean the AFM....Use Brake Cleaner.. Ask Sydneykid if you don't believe me.

[sav man]

I used carbie cleaner (in a sprey can) to clean mine. Best try all 3

[Bullant47]

I used carbie cleaner (in a sprey can) to clean mine.  Best try all 3

I used Contact Cleaner first and the car ran really bad. I rang C&V and Con said "Use Brake Cleaner" He'd seen Contact Cleaner stuff up on AFM's before and Brake Cleaner always works well.

[flagger]

wow guess i got lucky with my contact cleaner. i used the cheap dick smith stuff too

as for getting to the AFM, i just took off the top half of the airbox, then unscrewed the afm off it, then sprayed the guts of it through the grills on both ends

[hanyou]

hey when your car surges and then eventually turns off.. do u get alot of smoke blowing out of exhaust?. and surges to pretty much 0rpm then back to liek 1000rpm and back and forth?.. i cleaned my afm 2 days ago fixed the problem but its back but it doesnt happen all the time?...

[sigsputnik]

think i solved most of my problem by cleaning the afm...maybe is your filter dirty or something? otherwise could be your fuel pump has had the dick?

[EVL032]

If you just got it off the boat..............then more than likly fuel pump see it heaps

[hanyou]

cool will be changing my fuel pump this wedensday