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Author
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Topic: Supercharged car problem
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white1990stang
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Member # 2307
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posted
 
 
why would i have to push down on the gas to get my car to start? also when im doing about 80 in 5th and let off the gas the check engine light will come on and when i go to give it gas again it sputters for a second and then is fine. i know i need to pull the codes but i havent had a chance yet. problem seemed to start after i installed my powerpipe and upgraded my fuel lines and rails.
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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92stangLX
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Member # 3252
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posted
I would start by checking your fuel pressure and pulling codes. If I am not mistaken holding the gas pedle down will cause the injectors not to fire when staring so you may be flooding.
I have also heard of issues with MAF alignment when using a power pipe. Try searching the tech section for "clocking maf". I don't remember the details on this one.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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white1990stang
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Member # 2307
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posted
also i forgot to add. when i turn the key to the on position how much fuel pressure should i read? i read about 23 but when i start it it instantly goes to 42 or so. is that right or should i have 40 when i turn the key forward
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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getjobdone
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Member # 4666
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posted
quote:
Originally posted by white1990stang:
also i forgot to add. when i turn the key to the on position how much fuel pressure should i read? i read about 23 but when i start it it instantly goes to 42 or so. is that right or should i have 40 when i turn the key forward
it does this for me too. but it doesn't rapidly rise when i start the car. it needs to idle a bit with small revs to get up to about 40 or so
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91 notch ^ blown h/c/i
Posts: 677 | From: east bay,ca | Registered: Jul 2004
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white1990stang
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Member # 2307
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posted
ok so that must be normal then. i just never noticed it before.
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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166 Merlo
FELONY
MOTORSPORTS
Member # 1549
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posted
I can usually start my car on the first try, but if I time it wrong, I have to hold down the pedal all teh way just like that also. Other wise it'll just crank forever
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'89 - Boss Coupe
'70 - Drop Cutthang
'68 - Cougnut
'87 - 0166, Its real
Posts: 3954 | From: Thebay | Registered: Jul 2002
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mtbaughs
Road Racer
Member # 4052
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posted
Set your fuel pressure to 40 psi with vacuum off. What kind of MAF are you running with the power pipe? Fuel system spec's? lmk Might just need some adjustment on the tune
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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mtbaughs
Road Racer
Member # 4052
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posted
If your running an aeromotive style pump if I recall correctly this pump does not have a check ball in it....meaning it won't maintain pressure after priming. Try cycling the key on a few times and than starting.... if this is what you've got
[ June 02, 2005, 12:03 AM: Message edited by: mtbaughs ]
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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2stangs69-91
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Member # 1951
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posted
if you have 42 # injectors you might be flooding your car on start up and low rpm operation?
[ June 02, 2005, 03:45 AM: Message edited by: 2stangs69-91 ]
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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street_illegal_stang
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Member # 1554
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posted
bad vss?vehical speed sensor maybe?
let us know what it was when you fix it.
Posts: 1276 | From: Long Beach C.A | Registered: Jul 2002
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S351-R
CAFords OG
Member # 1605
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posted
I agree with Mtbaughs. Cycle the key on and off a few times to build fuel pressure. If the fuel pressure is low while cranking, the injectors will not have an optimum spray pattern for proper fuel atomization which may cause the cylinders to load up with fuel. When the engine does fire up after you've been cranking for a while, do you get a puff of black smoke from the tailpipes?
Posts: 344 | From: Earth | Registered: Jul 2002
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