Hard starting after sitting for a few hours
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Hard starting after sitting for a few hours - 5/4/2008 6:24:16 PM
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CataclysmGT
Posts: 938
Joined: 7/24/2007
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Ever since the supercharger install, when I go to start the car after its been sitting a few hours, its cranks a few times, then sounds strange trying to start. The last few times it was required to try twice. Some black soot from the exhaust also puffs on the first hard start. I have noticed more fouling on the exhaust as well, but this could be due to the richer A/F of being supercharged.
Is starting a tuning issue?
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07 GT
FRPP/Borla Stingers,
Roush Suspension & Billet LCA's
Saleen Black 20's
*Whipple Crew Member*
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RE: Hard starting after sitting for a few hours - 5/5/2008 12:49:54 AM
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sidmanic
Posts: 324
Joined: 3/13/2006
From: Las Vegas, NV
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You might have a bad injector but you would think that the PCM would throw a code. Don't know what mods you've done to the fuel system. Do you know if the check valve is still in the pump assymb?
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424rwhp@399t @8psi
Kenne Bell,BMR,SLP,Eibach,Auburn,Strange,TCI,Prothane,Hurst,Ford Racing,BFG,MT,MGW
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RE: Hard starting after sitting for a few hours - 5/6/2008 6:30:11 AM
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MustangGT0405
Posts: 1043
Joined: 6/28/2007
From: Orlando, FL
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I have soot on my exhaust too, but no trouble starting.
Hate to harp on it, but did you ever get the FRPP tuner? I think that would clear up all of your trouble's till you head over to ST.
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2007 Satin Silver GT
5 speed manual
3.55 gears
Pypes Violater exhaust
MGW Shifter
BMR Control Arms
Whipple HO
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RE: Hard starting after sitting for a few hours - 5/6/2008 8:29:50 AM
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moosestang
Posts: 6789
Joined: 9/3/2006
From: Gainesville, FL
Status: online
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quote:
ORIGINAL: CataclysmGT
You know, I haven't got the FRPP tuner yet. I think I'll order it today, swap for the smaller pulley and then use that until ST's magic can be worked. Not that Justin's tune was bad, it was spot on after he adjusted it a bit (his A/F was so flat.....can't even be called a curve. )
At least the FRPP tune will ensure I don't blow it up....haha.
I'm still looking for someone that's blown a motor on the frpp tune. I don't think it's possible after seeing the dyno run on M0dular Fords where the air/fuel ratio was 16:1 or something, because they forgot to hook up one of the fuel pump drivers. That engine should have blew, but the tune pulled timing and killed power like crazy.
Mygt500 had a similar starting problem, but I think his was just when the engine was cold. Mine would stumble a little after sitting for 8-10 hours, but cleaning the MAF sensor seems to have cured it.
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whipple HO SC,FRPP springs, Pypes mid mufflers, Che adj. LCA, hurst, 4.10's, 1 piece DS, spec stg 2 clutch. 12.52@117.6mph so far with a 2.01 60 ft time.
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RE: Hard starting after sitting for a few hours - 5/6/2008 8:46:20 AM
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MustangGT0405
Posts: 1043
Joined: 6/28/2007
From: Orlando, FL
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Good idea, I think that will cure alot of your problems.
MYGT500 - had a cold start issue I think that was tune related.
Good luck with the build.
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2007 Satin Silver GT
5 speed manual
3.55 gears
Pypes Violater exhaust
MGW Shifter
BMR Control Arms
Whipple HO
Whipple Crew Member
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RE: Hard starting after sitting for a few hours - 5/7/2008 9:26:21 AM
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MustangGT0405
Posts: 1043
Joined: 6/28/2007
From: Orlando, FL
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5-10 seconds I dont see a big increase. Playing on the highway for long periods in the throttle, or back to back quick acceleration runs I have seen it get quite high.
But if you just stab it and go it takes a bit to climb.
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2007 Satin Silver GT
5 speed manual
3.55 gears
Pypes Violater exhaust
MGW Shifter
BMR Control Arms
Whipple HO
Whipple Crew Member
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RE: Hard starting after sitting for a few hours - 5/8/2008 2:09:55 AM
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JTE_502
Posts: 46
Joined: 3/23/2008
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I have this same problem in my 08. It only has 3000 miles on it and I have a C&L intake and Brenspeed tune. Every now and then after sitting for a while I will try to start it and it will just crank and crank and crank, and then finally when it hits it runs ragged as hell for a little while and blows out a bunch of smoke. It's like it just sits and floods itself for some reason. I wouldn't think its tune related as I have the same mods as a million other people. I guess I should go try cleaning the intake sensors first and see if that helps. I just don't see why with it being off how it manages to flood itself?
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RE: Hard starting after sitting for a few hours - 5/9/2008 2:05:46 AM
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mygt500
Posts: 5201
Joined: 11/26/2006
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You are right as well as moose! I had a cold starting issue when cold 40 or lower...resolved with a tweak of the tune! J
quote:
ORIGINAL: MustangGT0405
Good idea, I think that will cure alot of your problems.
MYGT500 - had a cold start issue I think that was tune related.
Good luck with the build.
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2006 Mustang GT with Cervinis Kit
Whipple H.O S/C 465 RWHP and 440RWTQ
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RE: Hard starting after sitting for a few hours - 5/9/2008 10:03:45 AM
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moosestang
Posts: 6789
Joined: 9/3/2006
From: Gainesville, FL
Status: online
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quote:
ORIGINAL: CataclysmGT
I found a solution: don't wait for the fuel pump to prime.
I usually let the fuel pump makes its noise, then turn the key. If I start the car cold, without letting the pump prime, it starts right up like normal.
That doesn't sound like a solution. Do you have a fuel pressure gauge? What's the fuel pressure after the pump runs?
< Message edited by moosestang -- 5/9/2008 10:04:29 AM >
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whipple HO SC,FRPP springs, Pypes mid mufflers, Che adj. LCA, hurst, 4.10's, 1 piece DS, spec stg 2 clutch. 12.52@117.6mph so far with a 2.01 60 ft time.
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