94 c4 lt1 stubburn start

[dave]

94 c4 lt1 w/90K is stubburn starting, however many times can turn ignition off and retry and starts right a way. Can hear fuel pump cycle every time. Does this sound fimialar to anyone or any suggestions.

 

[grumpyvette]

http://forum.grumpysperformance.com/viewtopic.php?f=32&t=1401

Its so comon,I even posted info on that in my data base

in the unlikely event your talking about the starter itself

http://forum.grumpysperformance.com/viewtopic.php?f=70&t=458

 

[gmjunkie]

94 c4 lt1 w/90K is stubburn starting, however many times can turn ignition off and retry and starts right a way.

Check the fuel pressure!! Should be 41-47 lb as soon as the pump cycles!
If you have to cycle it twice to get 41-47 lb,you have weak pump or clogged fuel filter! The filter is right behind the cross-member on the inside of the rt frame rail just in front of the passenger floorboard!!:thumbsup:

:usa_flag::wavey:

 

[dave]

Thanks for the info on your site. I did check the pressure and it is at 42lb. It holds steady after the pump stops and bleeds off quickly after turning off the ignition. Should it maintain that pressure after turning off the ignition? Or is this normal.

 

[navy2kcoupe]

Bad injector (s)? Check all of them out to make sure that they are all close to each other as far as resistance is concerned. 16 ohms sticks in my mind for the correct reading.........but Junk will know for sure.
Andy

 

[gmjunkie]

The pressure shouldn't bleed off more than maybe 7-8 lb in an hour!:shrug01:
You either have some leaking injectors or a bad fuel pressure regulator!:thumbsup: Remove the vacuum line off the small round canister on the fuel rail at the back above the egr. If there is evidence of gas in that line,the diagram is bad in the regulator!!:thumbsup:
If thats OK, then check the resistance on all the injectors (Book says 10-17.5 ohms) 16.5 is optimal!!:thumbsup:Un-plug each one and check the resistance between the pins!
Then remove the fuel rail and remove the injectors,you'll see the one or more that are leaking when you pull them out!!:thumbsup::thumbsup:


:usa_flag:Be American,Buy American!!
Even if it has to be a FORD!!:rofl1:

 

[dave]

Thanks again for the help. However I am having trouble understanding why the pressure holds after the pump stops and then bleeds off within a couple of seconds after the ignition is turned off. There is no electrical connection on the regulator only vac. What eclectrically is holding the pressure after the pump stops? If I have a leaking injector or regulator, shouldn't it bleed down as soon as the pump stops? Sorry if I'm asking stupid questions I just like to understand. Just checked each injector and they were all 12.5 ohms.