Thread: Hard starting after sitting for days.

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  1. #1 Hard starting after sitting for days. 
    GTX Level Member Sudden's Avatar
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    Since I put on my IC I have to turn over the car several times before it will start. Except for that everything is perfect. It only happens when it sits for a few days. Any ideas why?
    2005 Grand Prix GTP CompG. Overkill PCM, ZZP S2 I/C, ZZP MPS W/ 3.3" pulley, 1.9 YT rockers, 42.5# injectors, Moroso wires and AL104 plugs, 180 Thermostat, LS4 MAF.
    Front PLOG, Rear PLOG, crossover, all ceramic coated. ZZP 3" Downpipe and 3" exhaust pipes with Borla S-Type mufflers.
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  2. #2 Re: Hard starting after sitting for days. 
    Moderator dsmuts's Avatar
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    Maybe a vacuum leak?
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  3. #3 Re: Hard starting after sitting for days. 
    GrandPrix Junkie CTKGP09's Avatar
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    I too was going to say vacuum leak....
    '04 Chevy Silverado LT 4x4 - intake, headers, full exhaust, zo6 cam, 799 heads, tune, leveled, 33's
    '00 Grand Prix GTP DAYTONA 500 - L36 block, S1X, intercooled, GenV, N*, headers, full exhaust, coilovers, 5 speed swap, stage 3+ clutch
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  4. #4 Re: Hard starting after sitting for days. 
    GTX Level Member Sudden's Avatar
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    Quote Originally Posted by CTKGP09 View Post
    I too was going to say vacuum leak....
    Only after sitting more than 2 days and no trace of it except at startup?
    2005 Grand Prix GTP CompG. Overkill PCM, ZZP S2 I/C, ZZP MPS W/ 3.3" pulley, 1.9 YT rockers, 42.5# injectors, Moroso wires and AL104 plugs, 180 Thermostat, LS4 MAF.
    Front PLOG, Rear PLOG, crossover, all ceramic coated. ZZP 3" Downpipe and 3" exhaust pipes with Borla S-Type mufflers.
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  5. #5 Re: Hard starting after sitting for days. 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Vaccuum leak or by any chance have you checked your fuel pressure?
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  6. #6 Re: Hard starting after sitting for days. 
    GTX Level Member Sudden's Avatar
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    Quote Originally Posted by REDCOMPG View Post
    Vaccuum leak or by any chance have you checked your fuel pressure?
    Haven't checked the fuel pressure. Think it may be leaking down after sitting? I was thinking about putting a gauge on the new ZZP fuel rails.
    2005 Grand Prix GTP CompG. Overkill PCM, ZZP S2 I/C, ZZP MPS W/ 3.3" pulley, 1.9 YT rockers, 42.5# injectors, Moroso wires and AL104 plugs, 180 Thermostat, LS4 MAF.
    Front PLOG, Rear PLOG, crossover, all ceramic coated. ZZP 3" Downpipe and 3" exhaust pipes with Borla S-Type mufflers.
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  7. #7 Re: Hard starting after sitting for days. 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Could be.. I know if my GP is sitting for a few days it takes a few cranks to get it started.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  8. #8 Re: Hard starting after sitting for days. 
    I live here. theaceofspades's Avatar
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    Mine sat for a week and a half. Started perfectly fine
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS
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  9. #9 Re: Hard starting after sitting for days. 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Congrats?
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  10. #10 Re: Hard starting after sitting for days. 
    GTX Level Member Sudden's Avatar
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    Mind sits for two days it doesn't start on first time, usually on the second. This time it sat for 12 days and took several tries to get it going. This action started after I put the I/C on with the 3.4 pulley.
    2005 Grand Prix GTP CompG. Overkill PCM, ZZP S2 I/C, ZZP MPS W/ 3.3" pulley, 1.9 YT rockers, 42.5# injectors, Moroso wires and AL104 plugs, 180 Thermostat, LS4 MAF.
    Front PLOG, Rear PLOG, crossover, all ceramic coated. ZZP 3" Downpipe and 3" exhaust pipes with Borla S-Type mufflers.
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  11. #11 Re: Hard starting after sitting for days. 
    Turbo is the way to go. REDCRAPGP's Avatar
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    I wouldn't necessarily say it's the IC causing the issue could just be a coincidence..
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  12. #12 Re: Hard starting after sitting for days. 
    GTX Level Member Sudden's Avatar
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    Possibly, there was a lot done when the I/C when on, fuel rail, etc.
    2005 Grand Prix GTP CompG. Overkill PCM, ZZP S2 I/C, ZZP MPS W/ 3.3" pulley, 1.9 YT rockers, 42.5# injectors, Moroso wires and AL104 plugs, 180 Thermostat, LS4 MAF.
    Front PLOG, Rear PLOG, crossover, all ceramic coated. ZZP 3" Downpipe and 3" exhaust pipes with Borla S-Type mufflers.
    Reply With Quote  
     

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