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Thread: starting issues need help

  1. #1
    Join Date
    Oct 2009
    Location
    Stephenville,Tx
    Posts
    193

    starting issues need help

    Ok ever since I got my headers on and its gotten cooler the truck has been hard to start in the morninngs it turns over but stumbles real bad so I cut it off and start it again and it starts better any ideas? Starter goin out spark plugs bad? it seems like its always the first start of the day or if the truck has been sitting for more then 12 hours, like i said it starts but feels like its only running on 4 cylinders real rough
    Last edited by Ran06chevy; 10-11-2010 at 11:28 AM.
    2006 Chevy ECSB 5.3 - New L33 Motor,CAI, Descreened MAF, Nelson 93 tune, Transgo Shift Kit, servos, 3in exhaust, Borla, pacetter LT's, and ORY, Aeroforce Furture: stall, cam, 4.10's

  2. #2
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    795
    is it throwing any DTC's?
    2008 GMC Sierra SLE....370ci LY6 with some goodies SOLD
    1995 C2500- LS1 swap with a mp112
    build thread- http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html

  3. #3
    Join Date
    Oct 2009
    Location
    Stephenville,Tx
    Posts
    193
    nope not a one
    2006 Chevy ECSB 5.3 - New L33 Motor,CAI, Descreened MAF, Nelson 93 tune, Transgo Shift Kit, servos, 3in exhaust, Borla, pacetter LT's, and ORY, Aeroforce Furture: stall, cam, 4.10's

  4. #4
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,117
    do this next time you start the truck.

    turn key to ON position
    turn key to OFF position
    turn key to ON position
    then attemp to start.

    what you're doing is trying to determine if the regulator is holding pressure. if it starts after you prime the system, you know the regulator or pump is giving up on you

  5. #5
    Join Date
    Jan 2008
    Posts
    8,203
    my 08' does the same thing every morning,its first start ....sounds like shit

  6. #6
    Join Date
    Dec 2009
    Posts
    129
    Mine's been doing the same thing. Started about 2-3 mos. ago. So I figured it'd been a while since I've changed my fuel filter, so I did that & it seemed to clear up for a week or two. Then it wasn't every morning, it was sporadic. Just recently, in the last couple weeks, it's doing it again. But mine sounds like it's got a wicked cam or sometimes, shitty gas. Yesterday, I go to clear my DTCs since the lights on & instead of the usual po420, po430 it also had po170 & po174, which is lean in both banks according to my book that came with my old ass Superchips programmer, ha. All these years I was told that I had 3 out of 4 bad O2s, so I just go with it & call my friend at BatoZone to set me out all 4 sensors & he tells me that it's prolly my MAF. I told him it would've thrown its own code, if that were the case. I asked if the regulator could be at fault & he then said it could be my fuelpump. I told him I'd just replaced it last year. He says I need to check my pressure, so I do that today & at idle its around 43-46#s & when I rev it, it jumps to 50-55#s.

    I'm not exactly sure, but I thought I just read something on here lastnight about most all the GEN 3 truck motors were running around 59#s.
    I'd like to think it's something simple & fuel related since it really got better when I swapped the filter. Jeez ol' Pete, I mean hell, I have 267xxx on this bad gurl & drive the living shit out of hermost every chance I get.

    Which is why I'm trying to get this other motor built to relieve the original, although she's still strong & willing. I would like a good pinpoint before going out & buying all 4 O2s, hi-flows cats or ORY. Or another pump or regulator. It prolly wouldn't hurt to have it scanned by a better scantool, also, ha.

    Didn't mean to jack this thread either, BTW.

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