I have a 91 m52 converted to obd1 with a m50tu harness. I'm using a trm chip but I'm still running into a few problems. so basically I can get on the throttle about a quarter to halfway and it seems to cruise ok. but once the throttle is pushed past that it jus completely loses power and goes nowhere. I can stay halfway on the throttle and raise the rpm and it doesnt limit anywhere. I ended up putting in a spare ecu with the stock chip and it actually didn't really cut the power when getting on the gas it just ran like shit. so I'm calling trm tomorrow to figure something out with the tune but I wanted to know what everyone thought before hand or invade fixing the tune doesn't take it away. I changed the fuel filter and was going to test the pressure on the fuel pump after I call trm. so anyones input really helps! thanks guys
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cel works but no code reader. I unplugged the Maf and it runs even worse so I know my Maf works. I unplugged and cleaned the sensor on the tps. I've looked for vacuum leaks and cant find any. the guy said to check all my injectors and my fuel pump.If you're not going to do it right, please don't take it out on your car!
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Step one: fix your diagnostic port.
Step two: borrow a fuel pressure gauge and test that. Unexplained bogging under throttle could easily be the fuel pump taking a shit, or a clogged fuel filter.2006 GMC Sierra 2500HD 4WD LBZ/Allison
2002 BMW M3 Alpinweiß/Black
1999 323i GTS2 Alpinweiß
1995 M3 Dakargelb/Black - S50B32/S6S420G/3.91
1990 325is Brilliantrot/Tan
1989 M3 Alpinweiß/Black
Hers: 1996 Porsche 911 Turbo Black/Black
Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd
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I replaced the fuel filter and I was going to check fuel pump tonight. it just stumps me because with a stock tune 413 I can go full throttle and it won't completely cut power. is that just because the stock tune is for 17 lb injectors so it's not pushing enough gas to make it cut power?If you're not going to do it right, please don't take it out on your car!
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Originally posted by e-dirtym52 View PostI replaced the fuel filter and I was going to check fuel pump tonight. it just stumps me because with a stock tune 413 I can go full throttle and it won't completely cut power. is that just because the stock tune is for 17 lb injectors so it's not pushing enough gas to make it cut power?
Check fuel pressure, then start working your way through the sensors. And fix your damned diagnostic port.2006 GMC Sierra 2500HD 4WD LBZ/Allison
2002 BMW M3 Alpinweiß/Black
1999 323i GTS2 Alpinweiß
1995 M3 Dakargelb/Black - S50B32/S6S420G/3.91
1990 325is Brilliantrot/Tan
1989 M3 Alpinweiß/Black
Hers: 1996 Porsche 911 Turbo Black/Black
Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd
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ok. I'll check fuel pump pressure tonight. I heard some stuff about wiring in a vss. but everything I read on that people say they need it because they limit at 3500. that still wouldn't be a problem since I dont limit will it?If you're not going to do it right, please don't take it out on your car!
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Originally posted by e-dirtym52 View Postok. I'll check fuel pump pressure tonight. I heard some stuff about wiring in a vss. but everything I read on that people say they need it because they limit at 3500. that still wouldn't be a problem since I dont limit will it?2006 GMC Sierra 2500HD 4WD LBZ/Allison
2002 BMW M3 Alpinweiß/Black
1999 323i GTS2 Alpinweiß
1995 M3 Dakargelb/Black - S50B32/S6S420G/3.91
1990 325is Brilliantrot/Tan
1989 M3 Alpinweiß/Black
Hers: 1996 Porsche 911 Turbo Black/Black
Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd
sigpic
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