Running too lean

derrick gil · May 11, 2008

Hi guys. Recently installed a 331 stroker in my 89GT and it is running too lean. I also installed new 30# injectors and matching mass air meter. Can anyone tell me how to richen it up? Any help is much appreciated.

derrick gil · May 12, 2008

Anyone?

ls1beater4eva · May 12, 2008

what intake , heads? do you have a adj fp regulator ? if so what is yoru fp set at now? how do you know its lean? what fuel pump do ya have?

NIKwoaC · May 12, 2008

What MAF do you have? I know that some people have problems with their C&L units, and sometimes those "matched" meter and injector packages don't work great without a good tune. You could cheat it a bit by using an AFPR, like said above, but a tune is your best bet.

This is all assuming you are not having failures somewhere in your system.

ShortThrow50 · May 12, 2008

NikwoaC said:
What MAF do you have? I know that some people have problems with their C&L units, and sometimes those "matched" meter and injector packages don't work great without a good tune. You could cheat it a bit by using an AFPR, like said above, but a tune is your best bet.

This is all assuming you are not having failures somewhere in your system.

Here we go wih the c&l crap. ITs just as good as any imo. THat deffinately isnt the guys problm

derrick gil · May 12, 2008

ls1beater4eva said:
what intake , heads? do you have a adj fp regulator ? if so what is yoru fp set at now? how do you know its lean? what fuel pump do ya have?

Holley systemax intake, AFR heads 185's, I do not have an adjustable fp regulator, stock fuel pump. Also have a pro-m mass air meter. It's running hot, and when you drive it, it doesnt have all the power that it should.

ls1beater4eva · May 12, 2008

ok well lets wait and see what he has mod wise so we know where to go from there now i have heard about c&l issues i personly have never had trouble with any of there meters btw but for all we know he mite have a fuel pump going out

Mr. Rustypwnz · May 12, 2008

well fix your running hot issue and then see how it does, fix all the broke crap before you run it...

derrick gil · May 12, 2008

slow95gt said:
well fix your running hot issue and then see how it does, fix all the broke crap before you run it...

I believe that with it running lean, maybe thats why its running hot. What do you mean by all the "broke crap"?

ls1beater4eva · May 12, 2008

ok whats your timing at? bc if you have to much it would cause it to run hotter then normal too, allso get you a 255 intank and a adj fpr

NIKwoaC · May 13, 2008

ls1beater4eva said:
ok whats your timing at? bc if you have to much it would cause it to run hotter then normal too, allso get you a 255 intank and a adj fpr

+1

You definitely shouldn't be using a stock fuel pump with that setup, most will tell you that a stock pump is barely adequate for the stock 302. A 255 lph pump will work great, and allow for some amount of forced induction or nitrous later down the road.

Too much timing will lead to engine knock, and running lean can cause lean detonation, both can cause serious engine damage and if nothing else, excess heat.

ls1beater4eva · May 13, 2008

yea i know all about the timing causeing heat lol i have to back mine down with my 347 every summer out here in nc bc it wants to start pinging and makes my temp guage go up but i know how to fix that i just throw race gas in it that allways calms her down

Running too lean

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