Rb20det R32. What Is Wrong With It?

[colesy_skyline r32]

Hey there.

im new to this forum, have only just registered, but the reason being...

i bought a 1990 R32 Skyline RB20DET a couple weeks ago and since i got it, it's been playing up.

If i drive it even driving like a grandma, all of a sudden it will start mucking up and wont let me rev past 2500rpm at all.

then wen i'm at the lights once it starts doing that the car rev;s on its own back and forth between 1000 and 2000 rev's and quite offen when i go to take off from the lights it will just dead stall on me no matter how high i rev when taking off.

and the thing is it comes and goes so might happen for 5 mins while i driving then fine for the next 10 then come back for 30 secs etc...

has anyone else had this problem/a similar problem?

i havent had a chance to get it checked out yet but the guy i bought it off is willing to help me out with the costs of fixing it but he reckons it would be something to do with the immobiliser as it is connected to both the fuel pump and the ignition...

i am wondering whether i should just get the immobilisor replaced or looked at or pay the money to get it hooked up to computer and see whats wrong??

or does anyone else have any other idea?

cheers

Edited May 15, 2008 by colesy_skyline r32

[WazR32GTSt]

you have a problem with your air flow meter or AFM

do a search for "+solder +AFM" and you will see how you can fix it yourself with a soldering irom and a bit of electrical/mechanical knowledge

otherwise get your hands on a second-hand air flow metre which would set you back around $150

good luck

Warren

[colesy_skyline r32]

you have a problem with your air flow meter or AFM

do a search for "+solder +AFM" and you will see how you can fix it yourself with a soldering irom and a bit of electrical/mechanical knowledge

otherwise get your hands on a second-hand air flow metre which would set you back around $150

good luck

Warren

ok thanks, is that definitely the problem??

would that also have something to do with the fact sometimes when i turn the car off and leave the turbo timer going for 90 secs and it sometimes turns it off after like 30 seconds or 60 for what ever reason?? but it usually does that when iv had the problems whilst driving..

thanks, im new to turbo's this is my first proper turbo..

cheers

[WazR32GTSt]

not definately the problem, but it sounds like it could be and is a good place to start as its a part that notoriously fails on the older rb engines..

turbo timer is unlikely to have anything to do with it and its probably just a shit turbo timer

some other things that may be the problem would be

- auxillary air control valve (AAC valve)

- idle air control valve (IAC valve)

- crank angle sensor (or CAS)

if you want to know moreabout these do a search of the forums archives there is HEAPS of info out there on this already your problem has been solved many times before and its painful to write it out all again

start with the AFM and go from there, if you really don't know much about cars take it to a mechanic and ask them to check your AFM or source you a replacement one

Edited May 15, 2008 by WazR32GTSt

[colesy_skyline r32]

not definately the problem, but it sounds like it could be and is a good place to start as its a part that notoriously fails on the older rb engines..

turbo timer is unlikely to have anything to do with it and its probably just a shit turbo timer

some other things that may be the problem would be

- auxillary air control valve (AAC valve)

- idle air control valve (IAC valve)

- crank angle sensor (or CAS)

if you want to know moreabout these do a search of the forums archives there is HEAPS of info out there on this already your problem has been solved many times before and its painful to write it out all again

start with the AFM and go from there, if you really don't know much about cars take it to a mechanic and ask them to check your AFM or source you a replacement one

ok thanks for that...

i spoke with the guy i bought the car off and he has a laurel which has same rb20det engine and we are going to swap over the afm from that car on the weekend and see if it fixes the problem rather go straight out and buy a replacement..

[WazR32GTSt]

great idea, hope it works. good luck!

in the meantime spend a few hours searchign through old threads an read about different experiences people have had with the rb20 and you will learn so much

[boliztik]

should try just cleaning it mate worked for me

[colesy_skyline r32]

thanks guys...

swapped the afm along with the pod filter both from the laurel and runs sweet now!!!

thanks for all the info...

saved me spendin money on auto elect etc