MASSIVE HELP!! car wont/then started?? urggg

[Die Ford V8]

ok, i have posted on how my car will every once in a while just run like crap. i mean crap. like its running out of fuel and then the more rpms i give it it doesnt like it. i will put it in neutral and rev till 1100 then 1200 then 1300 then eventually up till the limiter cuts out fuel at 4000rpm or so. then i drive it and it runs fine for a few days. I have good gas and my coils are throwing plenty of spark when it runs crappy. my wires are good and plugs would obviously not be the culpret.

about 10 minutes ago i started my car up and it ran like crap again, i thought i would try something new and turned it off only to find it ran worse. like so bad it died on me. then after about 10 minutes of intermitant cranks i let the car set for about 20 seconds and i called my friend. the car slowly came till about 700 rpm so i feathered the gas and then put my foot into it till 4000 rpm. now it runs great like always and starts perfect.

I AM STUMPEDDDDD!!!!

the only thing i can think of is the fuel pump, or ICM. the computer will only read a "random misfire" when the car runs like that if it picks up anything at all. it only happens after the engine is warmed up. ummm. i took off my intake to look for obstructions, but found non.

to liken it to something my car runs like you just took the brake master cyclinder vacuum line off. but only sometimes and eventually goes away. this was bad and i didnt think it would ever start again, i mean i cranked the heck out of that thing. i am just plain dumbfounded :(

[Turbo V6 Camaro]

if you going down the road and it cuts off in high RPMs that usally the pump.... not always tho

hard starts i would say 80% of the i have seen these case's on the board is the fuel pressure regulator..

you need to check your fuel PSI. before you buy ANYthing at all... check your fuel PSI and report back .

[BLLDOGG]

Originally posted by viper04af:

you need to check your fuel PSI. before you buy ANYthing at all... check your fuel PSI and report back .

yep

[Die Ford V8]

ok, my car never cuts out after it starts the run regular. in fact i rod it like always and drive kinda hard. pass it through high rpms alot and nothing...but, every once in a while it seems as though my car has the ebrake ona little when i am accelerating. then that feeling goes away.

how do you check the fuel pressure and the regulator and where could a rent one or buy one for cheap. i can barely make rent so i gotta be cheap

[Turbo V6 Camaro]

Originally posted by Die Ford V8:
ok, my car never cuts out after it starts the run regular. in fact i rod it like always and drive kinda hard. pass it through high rpms alot and nothing...but, every once in a while it seems as though my car has the ebrake ona little when i am accelerating. then that feeling goes away.

how do you check the fuel pressure and the regulator and where could a rent one or buy one for cheap. i can barely make rent so i gotta be cheap

if your car is just hard to start, next time

when you turn your key to "on" you here the fuel pump pime..... (you should lol) do this about 3 times and the car will start right up (should)...

also since the fuel PSI regulator using a vaccum check for a va leak somewhere

to check the fuel PSI you need a guage on the vuavle on the fuel rail on the pass side side that little black cap.... unsrew it and then screw on the the guage.....

[Die Ford V8]

also, will i have to wait till it does this again to check the feul pressure or not. it seems the fuel pressure would be fine till it acts up. although i think if anything at all the fuel pressure would be lower than spec. by the way what is spec?

how much is a regulator and are the easier to replace than a water pump? :rolleyes:

this doesnt seem like a fuel filter problem, but i will change that spring break regardless.

i have a haynes or chiltons so i think that will give me some ideas.

i figured it was fuel related, since my friends fuel pump just went out of his 88 chevy truck and it ran like mine except didnt get better.

i have also ran out of gas multiple times and i was told that wasnt good for a fuel pump.

[Turbo V6 Camaro]

since you have a 1996 the fuel psi should not be below 40 psi and should hold there with out hte motor running for some time....

it varys with the temp of the air but i have never seen mine below 40 even in -10* ohio wheather

[Die Ford V8]

i did the whole turn key on for a while then off then on then off then on for a while then starting it and it didnt seem to help much. i left the key on for 30 seconds or so and it later fired up. hmm. well thanks, but you didnt answer one question, where do i get the gauge and how much is it,

its not a tire gauge is it, sorry if thats a dumb question i will check into this more tomorrow as i need to go,

again thanks man for your help and I will keep you all posted.

[black98V6]

any parts store will have a fuel pressure guage, I'd say under $20

[mrbako]

Originally posted by Die Ford V8:
i left the key on for 30 seconds or so and it later fired up.

waiting that long doesn't accomplish what he was trying to get you to do...

when u turn the key, the pump will prime for only 2 secs. so, every 3 sec, turn it back off, then on again for another 2 secs. you should be able to hear it come on each time. if you don't hear it, then try pulling the key out quickly between tries.

if this doesn't get you fuel pressure, or if u can't hear the pump priming every time, then check the relay. your fuel pump relay is under your hood, and you should hear it click once when the key is turned, and another click after 2 secs when it's done priming. make sure that all the wiring to the relay is good and not grounding.

you also might want to get your alternator & battery tested @ autozone or somewhere that they do it free.

[HeadyFirebird'00]

No offense to anyone suggesting the primeing thing, but that sounds like a lot of crappy work. our cars are not carburated. Its seems it would not help any different if you didnt prime it. i am not tryin to diss anyones suggestions, it sounds pointless if the fuel is always under constant pressure, even with the car off.

I would make more sense if we knew for sure that the pump was crappin out on him.

[Turbo V6 Camaro]

Originally posted by HeadyFirebird'00:
No offense to anyone suggesting the primeing thing, but that sounds like a lot of crappy work. our cars are not carburated. Its seems it would not help any different if you didnt prime it. i am not tryin to diss anyones suggestions, it sounds pointless if the fuel is always under constant pressure, even with the car off.

I would make more sense if we knew for sure that the pump was crappin out on him.

no this tests if the fiel system is holding psi like it should... and is it really that hard to turn the key a few times
if the FPR is bad the fuel pump will have to prime a few times to biuld up the coorect psi for the injectors to work...

[BigBlue]

Knowing, a quite detailed background in pumps, the pump should technicaly not lose its "prime" if there is still liquid in the lines...the presure will take sometime to build depending on the pump but I was just curious if fuel pumps worked the same way as water pumps? If this is the case, id say the pump is just losing its prime and needs replacement [img]smile.gif[/img]

[Turbo V6 Camaro]

Originally posted by BigBlue:
Knowing, a quite detailed background in pumps, the pump should technicaly not lose its "prime" if there is still liquid in the lines...the presure will take sometime to build depending on the pump but I was just curious if fuel pumps worked the same way as water pumps? If this is the case, id say the pump is just losing its prime and needs replacement [img]smile.gif[/img]

after you turn off the key the PSI slowly bleeds off the system