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87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sat Jul 23, 2011 10:04 pm
by B5150
k so my bronco has always ran great. until one day i came home randomly came home to move it one day an it would not start! i feel like ive tryed everything. it has spark. 40+ lbs of fuel pressure. tested injectors and they pulse. it will run and rev on either/carb cleaner. replacements started with battery, fuel filter,fuel pump, pump relay, inertia switch. idk were else to go its all i got so i have to get it going!

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 4:20 am
by Ranger Dave
injectors may pulse, but anything commin out of them. check for water. i went through the same thing with a full size

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 10:52 am
by 101btp
dose it have a gas cap on it

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:17 am
by B5150
well when i tested them i put two testers on it. a fuel pressure gauge to the little valve. an an injector tester to the clip that go's on top on the injector. how can you tell if gas flows. an how do they come out without me breaking somthin cuz im good at that..


an when i tray an start it sounds like it almost fires the first time then just will crank n crank

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:29 am
by Ranger Dave
what year is this rig?

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:33 am
by B5150
1987. well 9/86 so its a 87.

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:33 am
by Ranger Dave
cycle the key on/off(dont start) for say 10 times, see if it runs longer

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:34 am
by Ranger Dave
k, it has 2 fuel pumps, see if there both commin on

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:47 am
by B5150
notta. an after i put my tank an everything back in i noticed it had a gergling like bubble sound in my tank when i cycle. an i have plenty of gas. both fuel pumps are pretty loud an i have great fuel pressure.

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:49 am
by drofman
don't know if this will help you

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:55 am
by drofman
might want to test your fuel pressure regulator. if it runs on spray can, then it's gotta be a fuel problem. just throwing stuff at you

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 11:58 am
by B5150
idk i know my pumps are good. it runs on either like it used to sound! but i don do it long .

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 12:00 pm
by B5150
weres that

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 12:03 pm
by Ranger Dave
whats the FP while cranking it over? mine is at 40 but fluctuates,then once runnin drops to 30,step on the gas,up to 40

Re: 87 B2 MYSTERY PROBLEM! HELP NEEDED

Posted: Sun Jul 24, 2011 12:05 pm
by Ranger Dave
B5150 wrote:weres that
on the fuel rail with a vac line goin to it, next to the port where you tested the presuure