scoobynelly

iTrader: (21)

Hi all,

I have recently fitted a FMIC to my classic 1995 wagon. Prior to fitting, my car ran perfectly.

I needed to purchase a new induction kit as the hks mushroom fouls the bonnet.

I bought an apexi induction kit and fitted it, happy days. However, if I start the car it for 5 mins or so idles perfectly without the MAF clipped in.

If I plug the maf sensor in the car stalls almost straight away. Why is this?

I would leave it out, but after a while the idle goes abit lumpy and feels like crap to drive

Any ideas? PM or reply the thread if anyone can help!

Cheers

Turbotits

iTrader: (2)

You probably need the map altering for the mods youve fitted. Is the new maf tube a bigger bore than you had?

scoobynelly

iTrader: (21)

I think the bores are very similiar sizes looking at them, I thought I may need a remap, but I really didnt think just swapping a top mount to a FMIC would make so much difference :/

In a lucky way, I have a Simtek ready to fit, so can lose the MAF altogether. However I still need to drive the car to Bob Rawle to get mapped Will it damage the car if I drive it without the maf plugged in?

Turbotits

iTrader: (2)

If you think about how much extra air is in your front mount and pipe work compared to the top mount it id guess 50% at least more. Still i would have thought it would run though

scoobynelly

iTrader: (21)

It runs on idle almost fine, just after a while gets slightly out of rev sync. Yea I suppose the air ratio is amazingly different.

I think over time I mayve have accumulated some water in my turb entry possibly, as my dump valve is spraying some water out when i rev the engine. Cant see anything else causing it, and my turbo managed to fill up with water :/ so may have something to do with it running uneasy

ukpaisley

iTrader: (4)

Was the IC a new one ? , most pessure test with fluid , maybe thare is residual fluid in the IC. Tha car should run fine with the FMC, but dont put it on boost as it will def need remap. I expect there is a leak somewhere.

scoobynelly

iTrader: (21)

Yea was a brand new one. I have found the problem I think theres a stem on the induction elbow ( from the turbo to the first part of my induction kit ) that used to have the recirc in. Thats exposed and i think that's my problem.
I need to blank 2 pipes off on the apexi hardpipe too.

Wasnt sure it would be a problem, but apparently the complete circuit has to remain air tight. Makes sense I suppose

Turbotits

iTrader: (2)

Yes has to be air tight or the maf cant measure the air being drawn in. Air coming in those holes is un measured