87 fullsize bronco ard to start

86ttops · February 1st, 2008, 10:16 PM

K my 87 snow plow bronco is hard to start itcranks and cranks and suters ten starts. If you turn the key on and of a couple times as to get more fuel pressur it starts easyer but i tested the pressure on the fuel rail wich is a 302 by the way and it is fine it is like it is bleeding off also we put a timing chain in it it jumped time about the same time as tis started could te dist be a tooth off or something?

86ttops · February 1st, 2008, 10:17 PM

i changed the fuel fillter as well new plugs wires cap rotor headers timing chain

8t6gt · February 2nd, 2008, 02:19 AM

Interesting. I wish I knew how to help you out on this

86ttops · February 2nd, 2008, 12:23 PM

ya i left it running all day yesterday to make sure i wouldnt have any starting problems most of the time i was pshing snow but still $160 in gas to run it for like 19 hours

DanTheMan · February 2nd, 2008, 04:11 PM

it could very well be timing.. is it stuttering while cranking? I would check the timing first..

mattstang · February 2nd, 2008, 07:15 PM

go back check tdc and adjust the distributor back.

86ttops · February 4th, 2008, 07:00 PM

when we did the timing chain we tried a tooth both ways and could not get it to fire you cant turn the distb to much because of the big plug hits the i think it was the waterneck or the a/c cant remember maybe i will go try it again tonight

mattstang · February 4th, 2008, 07:21 PM

find tdc, pull distributor and see where its as. if its off just pull the distributor and rewire it, much easier than pulling timing cover.

p-351 · February 9th, 2008, 02:32 AM

What do you have for FP?

I had fuel problems on my 91FSB--ended up being two problems. I had a bad fuel pump (it had no power and I could only get a max of 32psi with the vacuum line off), and a bad injector (#5 plug ran rich and it would stick open and bleed off pressure).

I knew that I had a bad pump so I changed that first. Power was great, but pressure would still bleed off too quickly, ran overly rich, and #5 plug still didn't look right. I put the gauge back on and saw that my pressure was erratic when it was running (I guess my old pump didn't put out enough to make the FP jump like that).

After changing out the pump, injector, and filter it would start and run alot better. Now if only I can get my IAC problems ironed out!

With that all being said, it is possible that you are off on your distributor---or even your timing chain. You might have to start by finding TDC on #1, verifying your timing marks on your balancer line up, both valves are closed, and that your distributor is on #1.

If you need anymore Bronco specific info check out FullSizeBronco.com- great bunch of guys with lots of good information. If you get on there and have any questions feel free to ask--I go by the same screen name there.

February 2nd, 2008, 02:19 AM	#3
8t6gt From the land of the wolverines 1986 Mustang GT Join Date: Apr 2007 Location: Smothering v606er with a plastic walmart bag Posts: 7,257	Interesting. I wish I knew how to help you out on this __________________ Hurst Crew member #2 of 21 Co Founder of all crews. Lee B and 8t6 the founders of crews Proud member of the no southerners aloud SNOWMOBILE CLUB!

February 2nd, 2008, 07:15 PM	#6
mattstang Hardcore Enthusiast Join Date: May 2007 Location: Henryetta, Ok Posts: 1,460	go back check tdc and adjust the distributor back. __________________

February 4th, 2008, 07:21 PM	#8
mattstang Hardcore Enthusiast Join Date: May 2007 Location: Henryetta, Ok Posts: 1,460	find tdc, pull distributor and see where its as. if its off just pull the distributor and rewire it, much easier than pulling timing cover. __________________

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February 1st, 2008, 10:16 PM	#1
86ttops Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 782	87 fullsize bronco ard to start K my 87 snow plow bronco is hard to start itcranks and cranks and suters ten starts. If you turn the key on and of a couple times as to get more fuel pressur it starts easyer but i tested the pressure on the fuel rail wich is a 302 by the way and it is fine it is like it is bleeding off also we put a timing chain in it it jumped time about the same time as tis started could te dist be a tooth off or something?

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February 1st, 2008, 10:17 PM	#2
86ttops Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 782	i changed the fuel fillter as well new plugs wires cap rotor headers timing chain

February 2nd, 2008, 12:23 PM	#4
86ttops Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 782	ya i left it running all day yesterday to make sure i wouldnt have any starting problems most of the time i was pshing snow but still $160 in gas to run it for like 19 hours

February 2nd, 2008, 04:11 PM	#5
DanTheMan Hardcore Enthusiast 1991 Civic DX 16min@42mph Join Date: Oct 2007 Location: Norfolk, VA Posts: 1,197	it could very well be timing.. is it stuttering while cranking? I would check the timing first.. __________________ click for my cardomain ^

February 4th, 2008, 07:00 PM	#7
86ttops Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 782	when we did the timing chain we tried a tooth both ways and could not get it to fire you cant turn the distb to much because of the big plug hits the i think it was the waterneck or the a/c cant remember maybe i will go try it again tonight

February 9th, 2008, 02:32 AM	#9
p-351 Regular 90&94 GTs; 79&91 Broncos Join Date: Aug 2007 Location: Fargo Posts: 143	What do you have for FP? I had fuel problems on my 91FSB--ended up being two problems. I had a bad fuel pump (it had no power and I could only get a max of 32psi with the vacuum line off), and a bad injector (#5 plug ran rich and it would stick open and bleed off pressure). I knew that I had a bad pump so I changed that first. Power was great, but pressure would still bleed off too quickly, ran overly rich, and #5 plug still didn't look right. I put the gauge back on and saw that my pressure was erratic when it was running (I guess my old pump didn't put out enough to make the FP jump like that). After changing out the pump, injector, and filter it would start and run alot better. Now if only I can get my IAC problems ironed out! With that all being said, it is possible that you are off on your distributor---or even your timing chain. You might have to start by finding TDC on #1, verifying your timing marks on your balancer line up, both valves are closed, and that your distributor is on #1. If you need anymore Bronco specific info check out FullSizeBronco.com- great bunch of guys with lots of good information. If you get on there and have any questions feel free to ask--I go by the same screen name there.

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