Projected horsepower
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From: Louisiana
Still hesitating tho, brand new plugs and I checked over every single plug and ground and spark plug wire, injector plugs. I'll literally checked until I can't check anymore and the hesitation won't go away. Still throwing maf and tps but as discussed maf isn't important and voltage is good on tps and from what I've read tps can cause sporadic throttle response but shouldn't cause a sputter. I. Guessing it's in the tune
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From: Louisiana
idles and runs smooth but when I drive it there is a constant miss when i accelerate. Feels like a misfire but plugs and wires are good and yes they are snapped all the way on, my old plugs weren't even bad but I changed them today just to make sure and I've tried msd wires and a factory gm set that I have and neither one makes a difference. If I'm at at stop and foot brake and press the gas it builds boost and sounds smooth, but when I drive its a different story. Afr stays around 14-15 and when i accelerate it goes down to 11 or 12
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I don't have an answer but you could try going old school on it and unplug 1 injector at a time , now obviously this will cause a rough idle but the goal would be to see if the rough running stays the same with a particular cyl shut down . Maybe isolate a cyl and be able to try a coil swap or injector swap to rule things out . That's all I have at this point
Thread Starter
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From: Louisiana
I don't have an answer but you could try going old school on it and unplug 1 injector at a time , now obviously this will cause a rough idle but the goal would be to see if the rough running stays the same with a particular cyl shut down . Maybe isolate a cyl and be able to try a coil swap or injector swap to rule things out . That's all I have at this point
If there are no codes or if you've investigated any codes, you do have and found they don't affect anything then it's probably the tune.
My Camaro ran poorly when I got it and it had supposedly been tuned (it killed the trans at WOT on the dyno so it never really got finished) but it drove like crap, the first tune Pat G sent me had it driving significantly better.
My Camaro ran poorly when I got it and it had supposedly been tuned (it killed the trans at WOT on the dyno so it never really got finished) but it drove like crap, the first tune Pat G sent me had it driving significantly better.
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From: Louisiana
If there are no codes or if you've investigated any codes, you do have and found they don't affect anything then it's probably the tune.
My Camaro ran poorly when I got it and it had supposedly been tuned (it killed the trans at WOT on the dyno so it never really got finished) but it drove like crap, the first tune Pat G sent me had it driving significantly better.
My Camaro ran poorly when I got it and it had supposedly been tuned (it killed the trans at WOT on the dyno so it never really got finished) but it drove like crap, the first tune Pat G sent me had it driving significantly better.
it's throwing a tps code and a maf code but it on speed density so the maf is understandable and I've put a meter on the tps and the voltage and ground reads good and from my understanding a bad tps causes surges, that's not what it's doing. I changed the plugs a few days ago and this morning I checked each coil with a plug and wire letting it spark on top of the motor and I did notice one that looked a little weaker then the rest so I went ahead and changed it and it still stutters as I accelerate
You can set the meter up on ohms and sweep the throttle and find any dead spots, might be worth a try.
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Verdad Gallardo Thread Starter
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From: Louisiana
yes I did, there's no dead spots. The tps light actually went off. I just pulled the codes again and it's only pulling the maf now. Before I changed the coil it was throwing tps but it went off. Still stuttering with acceleration tho
My car is speed density too and I don't get any MAF codes, if you're getting codes the ECU may still be looking for it.
I know Pat went in and turned a bunch of stuff off so the ECU wouldn't be looking for the MAF and a bunch of other stuff I've pulled out of the car.
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From: Louisiana
I wanna say if its still pulling MAF codes then your tuner set up the tune wrong.
My car is speed density too and I don't get any MAF codes, if you're getting codes the ECU may still be looking for it.
I know Pat went in and turned a bunch of stuff off so the ECU wouldn't be looking for the MAF and a bunch of other stuff I've pulled out of the car.
My car is speed density too and I don't get any MAF codes, if you're getting codes the ECU may still be looking for it.
I know Pat went in and turned a bunch of stuff off so the ECU wouldn't be looking for the MAF and a bunch of other stuff I've pulled out of the car.
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From: switzerland
no, sorry, on the contrary, if you are sd and are not getting p0101/2 on every start up you have not "failed the maf" properly in the tune.
the only further idea i can come up with, is that you find somebody who has an oscilloscope and is good (!) at it and have your ignition and injection analysed. you can see a lot of stuff on the graphs. i mean, before you kill something on the engine.
the only further idea i can come up with, is that you find somebody who has an oscilloscope and is good (!) at it and have your ignition and injection analysed. you can see a lot of stuff on the graphs. i mean, before you kill something on the engine.
Thread Starter
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From: Louisiana
no, sorry, on the contrary, if you are sd and are not getting p0101/2 on every start up you have not "failed the maf" properly in the tune.
the only further idea i can come up with, is that you find somebody who has an oscilloscope and is good (!) at it and have your ignition and injection analysed. you can see a lot of stuff on the graphs. i mean, before you kill something on the engine.
the only further idea i can come up with, is that you find somebody who has an oscilloscope and is good (!) at it and have your ignition and injection analysed. you can see a lot of stuff on the graphs. i mean, before you kill something on the engine.
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From: Louisiana
Fic says the high side pressure needs to be below 2600 and to raise the high & low current tables. I gave this information to the tuner. He seems confident he can figure it out and he had 6 other turbo trucks at his place and a fox body mustang with a turbo 6 liter as his personal toy so it looks like he can figure it out.
Thread Starter
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From: Louisiana
the coils seem to be working fine, there's plenty room now and something in the tune apparently. I'm not familiar with tuning but apparently thats one of the perimeters set in the tune?
Thread Starter
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From: Louisiana
Fic says the high side pressure needs to be below 2600 and to raise the high & low current tables. I gave this information to the tuner. He seems confident he can figure it out and he had 6 other turbo trucks at his place and a fox body mustang with a turbo 6 liter as his personal toy so it looks like he can figure it out.