Starting issues, fuel pump?

[mosinutty]

Having starting issues with my 89 Bronco II 2.9 L. Serviced the vehicle after purchase. Valve cover gaskets, plugs, plug wires. A couple of days after I serviced the truck I went out to start it and it fired briefly then quit. Would crank but not start. I gave it a try the next day and it started and ran fine? Drove to work today and when I got in the truck to come home I had the same issue, fired briefly then quit, cranks fine but will not start. I've noticed that when I started the vehicle in the past I could hear something clicking at the rear of the truck which I'm not hearing now, fuel pump? I checked the coil and plug wires for fire and I am getting a good spark.
In my Chilton manual it reads that the 89 2.9 with the electric fuel injection system, uses a fuel tank and fuel pump/sender assembly. Does this Bronco have an externally frame mounted fuel pump or is the pump mounted in the fuel tank? Could I have done something under the hood, changing the valve cover gaskets, that might be causing the problem like wiring? I don't think this is a timing chain issue due to the truck running fine after the 1st episode. What do ya think?

 

[chrwilkins30]

yes their is 2 fuel pumps. one in tank and one on the driver frame rail(almost by the trans cross member. that's about all i can help you with.

could just be a bad in-tank fuel pump that just happened to go bad after the tune-up.

 

[greasemonkey6886]

Negative on two pumps!! His is an 89 and they only have one pump in the tank. The 88 and earlier have the two pump setup.

 

[chazzone]

My '89 only has one fuel pump, and it is in-tank. I'd check for fuel pressure on the rail, but you should be able to hear the pump run for a few seconds, when you turn the key on.

 

[ROBSANTIL]

I had the same issues with my 88 bii. Found out it was my fuel pump relay. It cranked but wouldn't start. sometimes it would start. Had a friend listen under the hood for the relay to click. then he tapped it and the fuel pump kicked on. changed the the relay and everthing worked great.

 

[meskater132]

is there a slight knock when running? my 90 bII does not throw a code but has a minor knock it will crank very slowly new battery new cables new starter and still cranks slow but what it turns out is my timing is advanced too far sounds wierd i know but advanced timing will cause this and when it senses a knock it retards the timing which will allow it to run until next start up when it cranks slow again

 

[--weezl--]

the key here is it runs sometimes, but not others... this leads me to think that it's not a pump... as pumps usually either work or don't and if they are intermittent, it's intermittent for like a day, then nothing...

either way, check for fuel at the engine, there should be a shrader valve you can press in with a screw driver, if it sprays out, you have fuel, if not, you have a fuel delivery problem...