Topic: problem with 5.0

[daddyj]

my 95 5.0 acts like it has a fuel filter issue.  it cranks and runs strong, but sometimes when i turn it off, it won't crank again.  sometimes it takes 5 minutes, sometimes all night before it will crank again.  i changed the fuel filter by the gas tank but still have the problem.  any ideas?

[Konrad]

That should not have anything to do with the fuel filter. Your starter cranks the motor regardless of whether it is getting fuel or not. You most likely have some kind of electrical issue. For example the wiring to the starter. If the engine turns over but it doesn't fire up then you can look at fuel issues, but if it's not even turning over then that's irrelevant.

[Soaring]

So, it starts just fine when cold, but hard to start when hot?  Is that what I hear you saying? 

[daddyj]

no.  let me try to clarify.  the car will almost always start if it has been sitting for a while, overnight or whatever.  after starting it drives great.  but every so often, maybe 3 to 4 times a week, i can turn it off to go inside somewhere, come back, and it won't start.  it does turn over... and over and over and over.  but no crank.  sometimes it will crank if i let it sit for 5  minutes.  other times, i've had to leave it all night. 

i changed the fuel filter back by the gas tank.  now i'm starting to think fuel pump?  what do you guys think?  and if so, what can i do to know for sure that's the problem?  and finally, if it is the pump, how hard is it to change it out?

thanks for the help

[zebo87]

how old is the starter. is it the same starter or have you recently changed it. i just put an aftermarket starter on mine and had almost the same problem. i could start it after a day but after driving it around it wouldnt turn over. i had to have a couple of guys push me to pop the clutch. i found the starter needed to be shimmed. im waiting for it right now. i will have it on in a day or so and let you know how it works out.

[daddyj]

okay, but trust me, this thing turns over strong.  i mean, it will turn over and over until the battery eventually runs down. 

[Soaring]

If it won't start only when the engine is hot, then you have a fuel issue.  Somewhere in the fuel delivery system, the fuel is getting too hot and is vaporizing.  It could be in the line, at the pump or at the EFI.  First, check the line to make sure it is not near the exhaust, then follow up with a test to see if the fuel is getting to the EFI at a cool rate. 

[Konrad]

Sometimes "heat soak" can also affect electronics.

[daddyj]

okay, thanks for the help guys.  soaring, i'll start checking some of that stuff out.  i do have to say though, there have been a couple of times when it did not start from a cold start, but it's usually after it has been running.  it will also just die while i'm driving.  left me stranded in an intersection once when it died as i took off on the green light.  it will even sputter on the freeway at times, but it doesn't die on those occasions, it just seems to kick itself back in and keeps going.  other times, stop at a stop sign and let the idle drop too low.  dead.  crazy, right?

[Soaring]

I'm still thinking a fuel issue.  Take the fuel line off the EFI, and get a jar or a can, and have someone try to start the car with you holding that line in the jar or can.  Now, what kind of fuel pressure do you see?  If there is little to no fuel getting into the EFI either your fuel pump is about to go south, or you are suffering from vapor lock.  If you have a good steady stream, then something in the EFI is vapor locking. 

[rmodel65]

its the distributor! common problem

maybe the TFI module on the inner fender under the air cleaner

[toyota_5.0]

i have a 93 5.0 out of a t-brid is easy to put a wrie harness in a car and on the motor that not a 5.0 car bc it going in 1984 toyota celica??? any tips well help me out it my frist time doing something on my own i would like to have help thin out ask of some tip..thanks..

[rmodel65]

check out this link toyota_5oh  http://midnightdsigns.com/james/

[FAST JAX]

did U find the problem? I had the same issues with my 99 Taurus & fought it till I finally figured out it WAS the fuel pump taking a crap.. It would start & run fine when engine temp was cold, but if I stopped on my way to work for gas or coffee or anything & shut it off....90% ov the time it would not restart.... sometimes for hours...it'd turn over fine, but could not pump enuff fuel for the motor to run...drove me nuts till my buddy put a fuel pressure guage on the fuel rail when it was screwing up & it only had 5 lbs. ov pressure...

[Soaring]

  I've been saying all along it is a fuel delivery issue.  If it is a bad fuel pump, you won't get an adequate supply of fuel.  Simple mechanics.