smelser509

ok here is the story we bought the jeep guy said it was running fine he went in the store came out and started up but barely made it home.. when i got it towed to the house it started right up ran for about 1min started coughing and died.. so started it back up it took a few seconds but it did start then idled rough and died.. was told on here to change the IAC i did but no different so i changed the plugs,cap,rotor still no different idles then dies and wont take fuel... so i checked the fuel filter it was trashed put a new one on and noticed it was close to empty so i also put more gas in it along with a can of sea foam... now it will hardly start at all cranks and cranks and if it fires it dies... i could hear the pump prime and could hear it while it was trying to run .... so i had a friend crank it over while i sprayed small amounts of carb cleaner in the throttlebody it idled great ...... i need to fix this thing asap its all we have and money is tight what test can i do??????? thanks sorry

AMXJ

You might want to check the throttle body base gasket. Some Cheby's with TBI have a simular problem to yours. When the base gasket is bad and you spray something close or on the throttle body base the engine will smooth out. Just an idea!

Dennis

freegdr

fuel filter trashed as in how?

tjwalker

This is your clue. You may very well have a FUEL DELIVERY problem. And the only way you'll know is to test your fuel pressure.

Get a hold of a fuel pressure gauge (can be rented at parts store) and install it on the schrader valve on the fuel rail.

Compare your readings to factory spec. Yes, there are other possibilities, but proper fuel delivery needs to be ruled in or out EARLY in the troubleshooting process.

freegdr

if the filer was trashed as in chumnks of crap falling out of it might have clogged injectors remove fuel rail and injectors and clean the crap out

alloutperform

93 has a regulator on the return line i think.. check the vacuum line to it.

smelser509

ok i will pressure test it tomorrow and by trashed i meant like muddy water and the fuel pump is real loud to

b4wheeler

If the fuel pump is really that loud.. Change it.. It is pushing air and not building pressure.
I had a pump go on my other trail rig from sitting a couple years and running it low on fuel...
The fuel is used to cool the pump, so running it out of fuel will help kill the pumps quickly.

smelser509

i will get the money to replace the pump will let you guys know if that fixes it

g19n87r

sorry to thread jack but my fuel pump buzzes pretty loud is that at all normal

tjwalker

Some pumps are louder than others. I have found Airtex pumps to be the worse and because of that and reliability/longevity issues I have had with them, I won't install them any longer.

But if your pump has always been quiet and now it is loud? That can be telling you that your pump is on its way out the door.

Never install a cheap pump. I seek out brand names like Bosch, Dephi, etc.

freegdr

muddy water rust in gas tank maybe clogging fuel pump sock?

Rikkadog

If it's that bad you need to clean the whole fuel system including the fuel tank, injectos, rail, and all lines and fuel pump. If you do it piecemeal you will continually have problems