baby come back... - 3000GT/Stealth International Message Center

camaro0281 · 12-13-2012, 07:11 PM

out playin with the stealth.. changed out iac.. yay no more white smoke from unburned gas... still has that miss around 2500 and stops around 3000 rpms... had ordered a mass sensor from ebay... when i got it in the mail i noticed there was no part number on it (someone removed it) hen i unplug it. it idles like crap, im guessin thats normal... but when i rev the motor, the miss is completely gone.. seems pretty obvious.. was wondering if anyone knows which sensors the ecu bypasses to run in loop mode. just keepin options open. oh ya i purchased that mass from JDM on ebay... dont know id trust them to buy parts from.. they said none of their parts has factory part numbers on them. lol. believe that?

Forest Gump · 12-13-2012, 07:59 PM

you may want to research the fuel pump resistor bypass. The resistor drops fuel pump voltage to about 6-7 volts at low loads. When the maf is unplugged it defaults back to full voltage.

Barring that I'd check for boost leaks to start.

GTOJOE · 12-13-2012, 08:36 PM

Had a similar issue with a stumble always at the same load point. Was caused by the delay between switching fuel voltage. Bypass the resistor as per above post. You can find the instructions on stealth316 in the fuelpump hotline page.

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camaro0281 · 12-14-2012, 12:29 AM

i had hunch it might be that resistor for fuel pump.. thanks a tons people.. i did not know it is bypassed with maf unplugged... just felt like the fuel pump sputterin to catch up..

camaro0281 · 12-14-2012, 12:37 AM

havin one more issue.. got alternator from ebay. has warranty.. when i get to that miss and go farther in the rpms, my interior lights begin to surge like the regulator comes in and out.. now as i turn the cas clockwise it becomes less noticeable... and i think it would go away if went even more clockwise... has anyone heard of their car knowing where the timing suppose to be at??lol... its like the car is tellin where the timing should be... timing light isnt working and heard cas should be about in the middle... other than that i checked for any big air leaks.. had all the turbo plumbing off and pressure washed them along with both intercoolers..

Forest Gump · 12-14-2012, 10:06 AM

so you are saying you hooked up a tool to the intake, pressured the intake piping, and went around every joint with soapy water checking for leaks? If you didn't do that you didn't find even half the boost leaks.

The first thing I'd do is get a reputable alternator. The "tests" the parts stores do practically amount to nothing.

Amazon.com: Denso 210-4130 Remanufactured Alternator: Automotive

camaro0281 · 12-14-2012, 03:39 PM

ya heard that too. dam parts stores... ok looked up fuel resistor and relay bypass... im gonna try with simplest first.. using the jumper wire on pins 2 and 5 i belive...
the next one was getting a relay with harness,(didnt specify which relay he was using,) dont know if u can use just any ol 4 plug relay... but he taps the new relay into the old relay with that black wire with blue stripe that is just looped back into the same relay it cam out of, and runs short power wire from new relay to battery. must be 2 foot long at max...
then theres doing the whole power wire going all the to the fuel pump method.. i dont think i need that. thanks for everyones input. its well appreciated