Car Fussy With Afm

[hijaked]

hey guys.

my car (r33 gtst) isn't runing so good.

i swaped my stock AFM with a mates R33 (green lable, that works fine in his car) AFM, and it makes my car run like garbage, the car doesnt idle right, won't even go past 3k rpm in seccond gear. not good to drive at all

i cleaned my dirty AFM with eletrical contact cleaner, and now my car runs just like it did with my friends AFM.

whats the go?? i have 2 ecu's and they both dont like my friends AFM or my now cleaned AFM.

[BHDave]

How did your's run before you took out your afm to clean it?

It may not be the afm you know, you could have a significant vacuum/boost leak in your intake piping which will give similar symptoms. Seeing as 2 ecus's dont like it and you've tried 2 afms i'd say you've eliminated both ecu and afm problems.

[hijaked]

yea theres severe leaks, before and after the engine, its not good at all... as i said car running bad.

bad = 3/10.... that was with a dirty stock afm, any ecu (both arnt stock, but close enough to it)

with my friends AFM or my now cleaned one, its running really bad 1/10.

i just don't know why the good AFM's don't like my car??

[Sydneykid]

The old

2 bads = running bad

compred to

1 bad + 1 good = running really bad

Happens all the time, the answer is to fix the remaining bad.

In your case the leaks are making the engine run rich. Less air is actualy going into the engine, so the ECU is supplying too much fuel.

This is partially offset by the dirty AFM which sends lower voltage signals to the ECU. Hence the ECU injects less fuel than it would if the airflow was accurate.

When you put a good (clean) AFM on, the ECU sees the correct (higher) airlfow and injects more fuel. The result is even richer running than when you had a bad (dirty) AFM.

The answer.....simple ...... fix the leaks.

Hope that helps

cheers

Edited January 5, 2006 by Sydneykid

[hijaked]

hehe yea i know... fixing leaks cost money , and i also need someone to do it, which would require me to drive my car for at least an hour to a decent mechanic, and im not sure if thats good for the health of my car.... as it just pours black smoke out of the back.

but you have answered my question for now... so thanks

cheers

[paulr33]

do you have a fmic fitted? if so put some soapy water on the piping and see where it bubbles, will easily bring up any leaks in the pipework

[The Mafia]

omg, my grandma could fix your leaks. Do it yourself... its so easy...

[CruiseLiner]

omg, my grandma could fix your leaks. Do it yourself... its so easy...

<{POST_SNAPBACK}>

lol exactly what i was thinking, are people totally uncapable these days or what? dont like dirty fingernails or something maybe? :lol:

[The Mafia]

I really don't know why people own these cars if they want to "boost them up" and not maintain them.

They shouldn't be allowed tobuy them... let alone whinge about them.

[hijaked]

my cooler piping is fine, it was the first thing i checked. cheers paul. or anything else that i could get my hands onto.

mr mafia, wtf. maybe you could send your grandmar over here so she can lift out my engine. see now that would be somewhat helpful.

hehe, you spend your time bitching about me. and then you say im whinging. goodone jono...

Edited January 7, 2006 by hijaked

[The Mafia]

you came here and whined about your car not running properly and then said you were too lazy to fix the intake leaks..

[hijaked]

"car fussy with AFM" doesn't equal lazy.

however being currently unemployed is. reason to why i don't have money, also reason why its taken so long for me to get car fixed.

i wish it were a simple pipe leak. but i beleive its a intake manifold gasket..

question was purely about the AFM and it was answerd. i have no intension to come out as a smartarse, you have been on SAU longer and you are also older, so i must respect that. sorry jono

[Cubes]

Its not plug/wiring issue?

[hijaked]

the afm and the connections are all good and working...

unfortunatly not in my favour, as my car sees the air now and floods my engine

[The Mafia]

ok, well, I'd check those manifold gasket leaks that you are talking about, and then maybe look at a stuffed FPR or maybe one of your injectors is stuck, or leaking.

So the car is blowing black smoke on idle? It will if it is fuelling too much.

[hijaked]

the car pours out the smoke on idle, its black.

the only reason i say manifold gasket, is because i can hear a high pitched air leak sound right at the front of the plennum, i dunno if thats normal, but i couldnt hear it on my friends car.

im gonna send the car to mechanic sometime soon, ive had enough playing around with it.

hopefully it wont cost too much to have the gaskets replaced.

but im sure the dude will have a look aroudn and see what needs to be done.