Not my car...it is speed density. But my brother has a 89 305 tpi 5 spd and when he tries to hook up a MAF it runs like crap. It will ususally go dead when you come to a stop. We were thinking it was in the wiring system, since it has a bunch of electrical tape around it. But we opened up the tape and found nothing wrong with it. His check engine light stays on all the time of course(he has a plastic cup with tape around it in place of the MAF and the harness is sitting to the side...gee I wonder why the SES light is on). But other than that the car runs great. He runs low fifteens which at the track we go to is really good. He gets better gas mileage than I do.
Any ideas on what is going on?


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1990 Formula 350
Hooker Headers, Random Technology Exhaust w/ no cat, K&N, Airfoil, AFPR, MSD 6A Ignition, Performance Resource chip, Metco LCA's w/ brackets, F Body Perf. Panhard Rod and Strut Tower Brace, KYB AGX shocks in the rear, A 3.08, open, drum rear end installed by previous owner (good choice), 1999 Formula Wheels, White Face Guage Overlays

 

your MAF is most likely bad, when its connected the computer tries to use the improper info the MAFis sending it and runs like a turd. but when you disconnect it the ecm goes into a defualt a uses the TPS primarily tomake timing and fuel adjustments. its happened to me before... get a MAF for it.

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87GTA ,10.5:1,4-bolt 355,afr 190's, super ram ,stock poerted base,58mmTB,24 lb FMS inj. ed wright chip, .510/230 (nr) 1&5/8 hooker shorty's, flow master single 3", 2800 ameri-torque non lk-up, 3.73. best to date with stk 48mm tb and lack of traction in 1st gear netted me a 12.9 @110mph /91 TA daily driver LB9 A4 2.73,
sitting in the garage : 26-11.5-16 et streets, sphon LCA's &rlb's, SFC's, b&m mega shifter....hope to install before the next century!!!

 

Ya that means your MAF is screwed up get a new one. It is called limf mode or somethin like that, the computer sends a saved base program to run your car, believe me you want a maf, it will run way better!!

 

Sorry I forgot to mention it WAS a new MAF sensor. And it did the same thing his old one did.

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1990 Formula 350
Hooker Headers, Random Technology Exhaust w/ no cat, K&N, Airfoil, AFPR, MSD 6A Ignition, Performance Resource chip, Metco LCA's w/ brackets, F Body Perf. Panhard Rod and Strut Tower Brace, KYB AGX shocks in the rear, A 3.08, open, drum rear end installed by previous owner (good choice), 1999 Formula Wheels, White Face Guage Overlays

 

change the maf relays first-and exchange the maf for another as shot relays can burn up a new maf......



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86 406

 

its called a burn off relay right? has something to do with the senor filament i believe

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87GTA ,10.5:1,4-bolt 355,afr 190's, super ram ,stock poerted base,58mmTB,24 lb FMS inj. ed wright chip, .510/230 (nr) 1&5/8 hooker shorty's, flow master single 3", 2800 ameri-torque non lk-up, 3.73. best to date with stk 48mm tb and lack of traction in 1st gear netted me a 12.9 @110mph /91 TA daily driver LB9 A4 2.73,
sitting in the garage : 26-11.5-16 et streets, sphon LCA's &rlb's, SFC's, b&m mega shifter....hope to install before the next century!!!

 

yep it sounds like the mass air flow is bad. what code does it have? Like stated a bove try the relay first but, I went through 2 napa mass airflows and my freind used one as well they never did work. we both ended up getting new ones from the dealer and that was all it took don't ask why but, some after market brands just won't work I have heard good about the auto zone ones though too. I guess they are cheeper and flow more. may be I just saw 3 of the only napa ones that did not work but, I doubt it.