hello this is my first post*adds dancing banana*anyways i boosted my 420a with a t3/t4 setup and im running 5 psi of boost,everything seems to be okay under half throttle then when i hit the gas my car seems to sputter kinda like its not getting fuel/spark and is faster at half throttle then full throttle??? but I gapped my ngk cold plugs about 0.15 closer and for fuel i got 255lph pump/sotck injectors/sfmu/safc,im not using a FCD so does this sound like a fuel cut problem?any info/advise is apreciated.

Fuel Cut..need an FCD.

-MIKE-

Stroked 2.2L

Shouldn't really be part-throttle boosting anyways, but yes. You need a FCD.

Mike D
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cool im hoping thats all it is, i'll get a fcd and keep you posted on the outcome,but whats strange is right after the turbo install I took it to a shop called xact dyno to tune with my safc,i wonder why they didnt mention the fuel cut issues to me when they dynoed???hmm oh well thx for the help peep

oh and are the hks fcd on e bay worth getting?

Mike and Paul sell FCD's on here. Check the BST section.

How were they "tuning" your car on the dyno with an SAFC?

Mike D
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well i took it to the shop cause i dont have a pocket logger/egt/wide band to tune with,they didnt tune with the safc,just adjusted my a/f ratio,after i got the papers it says my A/F ratio fluctuated between 12.7 and 11.9,its real jumpy in the graph basicly up and down up and down,so im thinkin fcd and its cured*prays*haha.

If you have a 95 you do not need to buy an FCD. A few 96's dont either. Anyone trying to sell you one for a 95 is taking advantage of you.

I would be more concerned about your fuel mixture at WOT. Do you have any way to measure the o2 counts or have a wideband perhaps? Sounds like your flooding when you go WOT.

Terry

2 sets of injectors is better than 1 =)

Did you figure out the problem yet?

I seem to have something possibly similar going on. I don't know what your plugs are gapped to now, but try gapping them to .025". I know it seems small,... just try it.

I also had a problem with detonation. I fixed it with my ignition by just pulling timing with boost.. anyhow, try to regap your plugs to where I said and see if that works for you,.

Built block.
Refinished head.
Tuned suspension.
TURBO.

cool ill give it a shot for sure, but anyways what did you do to set timing back bzozz?I was thinking of getting the msd retard box,

I have a crane aftermarket ignition. I just purchased their little map sensor thingy, that attaches to a timing retard control box, and vuala.. my timing is pulled as boost comes up.

I don't know how some people do it. If I didn't pull timing I would be detonating all over the place. I have 8.8:1 compression, and am not boosting that much. I don't really understand why I am detonating so much, but I have not really heard of others having that problem.

Anyhow, hope that helps. i do recommend the iginition however. It is sort of pricy, but it gives you a little more control over your car. as far as timing is concerned anyhow.

Built block.
Refinished head.
Tuned suspension.
TURBO.