This is topic Supercharged car problem in forum Tech Talk at Northern California Ford Owners  .


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Posted by white1990stang (Member # 2307) on :
 
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.
 
Posted by 92stangLX (Member # 3252) on :
 
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.
 
Posted by white1990stang (Member # 2307) on :
 
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
 
Posted by getjobdone (Member # 4666) on :
 
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
 
Posted by white1990stang (Member # 2307) on :
 
ok so that must be normal then. i just never noticed it before.
 
Posted by Mr JoCo (Member # 1549) on :
 
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
 
Posted by mtbaughs (Member # 4052) on :
 
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
 
Posted by mtbaughs (Member # 4052) on :
 
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 ]
 
Posted by 2stangs69-91 (Member # 1951) on :
 
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 ]
 
Posted by street_illegal_stang (Member # 1554) on :
 
bad vss?vehical speed sensor maybe?
let us know what it was when you fix it.
 
Posted by SALEENx5 (Member # 1605) on :
 
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?
 




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