#59718 - 01/16/06 12:29 AM
pcm and starting questions.
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Registered: 11/25/05
Posts: 108
Loc: Minnesota
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what happens when you disconnect the PCM from the car for like a few minutes. does it like lose info or anything. Cause i recently did a fuel filter on my car, and i did disconnect the pcm. i dunno why i really did that. But now my car cranks for a really long time before it will start up. Do i need my case learned or something? please help. would that affect timing at all?
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 Short Ram Air Intake | Throttle Body Spacer| Throttle Body Screen Removed | ZZP PCM | 180* Thermostat| Debaged |Flipped Sway Bar | Strut Tower Stabilizer | Motor Mounts | Tr55's | Coming soon : 3" DP |
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#59719 - 01/16/06 12:31 AM
Re: pcm and starting questions.
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Registered: 04/22/05
Posts: 3075
Loc: Cleveland, OH
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Probably cranked for a long time because it was getting your lines back full of fuel.
Shouldn't keep having that issue.
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#59720 - 01/16/06 12:34 AM
Re: pcm and starting questions.
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Registered: 11/25/05
Posts: 108
Loc: Minnesota
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no i keep having this issue. i didnt replace the pcm just disconnected it for like 20 seconds. it'll like start then die. then the second time itll start up
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Short Ram Air Intake | Throttle Body Spacer| Throttle Body Screen Removed | ZZP PCM | 180* Thermostat| Debaged |Flipped Sway Bar | Strut Tower Stabilizer | Motor Mounts | Tr55's | Coming soon : 3" DP |
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#59721 - 01/16/06 12:59 AM
Re: pcm and starting questions.
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Registered: 10/25/05
Posts: 86
Loc: Warminster, PA
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did you check the lines for any leaks?
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#59722 - 01/16/06 01:12 AM
Re: pcm and starting questions.
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Registered: 11/25/05
Posts: 108
Loc: Minnesota
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i will on tuesday, but im pretty sure i dont have any leaks. i will spened some time trying to figure this out.
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Short Ram Air Intake | Throttle Body Spacer| Throttle Body Screen Removed | ZZP PCM | 180* Thermostat| Debaged |Flipped Sway Bar | Strut Tower Stabilizer | Motor Mounts | Tr55's | Coming soon : 3" DP |
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#59723 - 01/16/06 08:12 AM
Re: pcm and starting questions.
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Registered: 05/23/03
Posts: 8078
Loc: Austin, TX
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Unplugging the PCM should not have any effect once plugged back in.
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Bobby
Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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#59724 - 01/16/06 10:47 AM
Re: pcm and starting questions.
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Registered: 07/15/04
Posts: 3141
Loc: Chicago, IL
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Originally posted by AustinGTP:
Unplugging the PCM should not have any effect once plugged back in. x2. If you left the PCM unplugged more about 20/30 minutes, it'll just 'erase' a few readings/measurements but once you plug it back on and start to run, the PCM will collect new data.
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DHP V1.0, Slotted rotors, S/S Brake Lines, Custom CAI, GMPP Handling Kit, KYB's, Jimmy C DP (U-Bend delete w/ Hi-flow cat), Flowmaster Super 40's, drilled 180° T-Stat, Alt. Rewire & Alt. Voltage Booster Combo, 605's, ZZP Motor Mounts
"The only difference between me and a madman is that I am NOT mad!" - Dali
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#59725 - 01/16/06 11:49 AM
Re: pcm and starting questions.
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Member
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Registered: 11/25/05
Posts: 108
Loc: Minnesota
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huh. alright thanks. anyone know why a car would crank but not start right away?
_________________________
Short Ram Air Intake | Throttle Body Spacer| Throttle Body Screen Removed | ZZP PCM | 180* Thermostat| Debaged |Flipped Sway Bar | Strut Tower Stabilizer | Motor Mounts | Tr55's | Coming soon : 3" DP |
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#59726 - 01/16/06 12:14 PM
Re: pcm and starting questions.
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Registered: 08/05/04
Posts: 644
Loc: South Bend
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it could be a number of things, corroded injectors, low fuel pressure, or maybe something in the line. Did you use teflon tape when you put the new filter on, maybe there is a peice that is overlaping on the connector and is inside the line, its really hard to tell unless your throwing a specific code, or unless you have it hooked up to a scanner
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 VS Cam,CompCams lifters,ZZPpushrods,Rollmaster double,4"intake,PLog headers,3"exhaust,IntensePCM,3.3"mps,ZZPHDTrans,3.29gears,2500 stall,GMPP adjustable suspension,TB spacer,160*tstat
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#59727 - 01/16/06 12:37 PM
Re: pcm and starting questions.
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Registered: 11/04/05
Posts: 113
Loc: Houston
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Since you disconnected the pcm, I'm assuming you disconnected the battery also. Check you're connections there. My car cranks a little longer when the positive post starts getting corroded again. Clean it up and I barely have to turn the key.
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#59728 - 01/16/06 02:12 PM
Re: pcm and starting questions.
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Registered: 04/22/05
Posts: 3075
Loc: Cleveland, OH
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Its possible the PCM could've been damaged. My dad as a service manager at a dealership saw a lot of strange problems like that fixed by reflashing/replacing PCM
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#59729 - 01/16/06 02:15 PM
Re: pcm and starting questions.
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Registered: 08/05/04
Posts: 644
Loc: South Bend
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Didnt think about that, but if your batter was still connected when you disconnected your PCM then there is a very good posibility that the PCM could have been damaged, you should always disconnect your battery before disconnecting/connecting your PCM
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VS Cam,CompCams lifters,ZZPpushrods,Rollmaster double,4"intake,PLog headers,3"exhaust,IntensePCM,3.3"mps,ZZPHDTrans,3.29gears,2500 stall,GMPP adjustable suspension,TB spacer,160*tstat
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#59730 - 01/16/06 04:14 PM
Re: pcm and starting questions.
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Registered: 10/05/05
Posts: 467
Loc: Niagara Falls, NY
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mine will crank for a second but usually only when its real cold out. hows the weather?
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 Homemade K&N FWI, Ported Mani's, 3" RT DP soon: PCM, HV TB, HV3
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