Dazed and confuzed
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Dazed and confuzed
I have a 1990 bronco 2 i bought that had some collapsed lifters , i parked it and started it about 2 times a month , finally after letting it sit for a year i decided to change out the lifters. when i went to start it up to move into my garage it would turn over and try to start but would never crank up and run, so agianst my better judgement i wnet ahead and put it in the garge and replaced the lifters and push rods, reduilt the distrubitor , put new plugs and wires on it , new o rings for the fuel injectors. and after getting everything back together it still would not run , narrowed it down to the fuel pump or so i replaced that , still will not run so i thought maybe the fuel pressure regulator was bad , i have another bronco same year modle that runs so i took the pressure regulator off of that one and put it back on still not luck , the vehicle tries to run if you pupm the throttle while starting but will not stay running for anything it acts like it`s starved for gas but i have plenty of fuel pressure so i`m at a loss now .
Anyone have any ideas.....
Anyone have any ideas.....
Postmaster
Joined: Dec 2001
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From: UT
Four things are needed to start: Air, fuel (in the correct amounts), spark (at the right time), and compression. Air usually isn't a problem, so we'll assume it is getting air.
You say it has plenty of fuel pressure. Does that mean 30 to 40 psi when starting? In some non-scientific tests I've done, these engine's won't start/run on much less than 25 psi.
Is the fuel getting into the cylinders (are the injectors firiing, are the spark plugs "wet" after trying to start)?
Are the spark plugs firing? Are they firing near TDC of the compression stroke? Have you checked the firing order to make sure you haven't accidently put the wrong wire to the wrong post on the distributor?
Have you done a compression test to make sure the valves are closing?
You say it has plenty of fuel pressure. Does that mean 30 to 40 psi when starting? In some non-scientific tests I've done, these engine's won't start/run on much less than 25 psi.
Is the fuel getting into the cylinders (are the injectors firiing, are the spark plugs "wet" after trying to start)?
Are the spark plugs firing? Are they firing near TDC of the compression stroke? Have you checked the firing order to make sure you haven't accidently put the wrong wire to the wrong post on the distributor?
Have you done a compression test to make sure the valves are closing?
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dazed and confused
ok checked the compression running anywhere from 115 to 150 psi per cyclinder, haven`t tested with a fuel pressure gauge yet. going to do that one tomorrow , seems to be enough fuel pressure but will not know until i test with a gauge .other than that i have checked or replaced everything else short of the fuel rail and fuel injectors, although it seems to be getting enough gas it acts as the engine is starving for gas also i have plenty of spark son no problems there either , any more ideas
Post Fiend
Joined: Jun 2002
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From: Atlanta GA
> i decided to change out the lifters
Triple check to make sure when you put the dist. in it was at TDC compression and not the exhaust stroke. I made that mistake once myself and it would barely run.
If you have fuel and spark and it ran before, I think that might be the problem.
Triple check to make sure when you put the dist. in it was at TDC compression and not the exhaust stroke. I made that mistake once myself and it would barely run.
If you have fuel and spark and it ran before, I think that might be the problem.
Elder User
Joined: Mar 2004
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From: Kansas City, Missouri
I would check the timing, chances are the timing chain was bad (or streched)to begin with, which might explain why it wouldn't start to move in the garage, and might still be a contributing factor in the lack of start now. As advised before, check the TDC and turn it over again, then see if TDC is still aligned.
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dazed and confused
have checked the timing 3 times to make sure i had it right , if i put gas in through the vacum lines it will kinda run until that gas burns off . i know i have fuel in the fuel rail but not sure if it is gettingf through the injectors , that and it wil not hold any kinda of pressure in the fuel rail, i took the fuel pressure regulator off of my running bronco and replaced it still no pressure. the only other thing i can think of is the eec relay which i`m going to replace tomorrow , but if that`s not it i`m at a total loss, so with that said any more ideas? i`m fresh out
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Postmaster
Joined: Dec 2001
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From: UT
I remember once taking the intake off of an engine, then reinstalling except that I forgot to plug the connector that goes to the injectors. It wouldn't start until I realized that mistake. Any chance you've missed a connector somewhere? Any chance you've misplumbed the fuel lines? I've heard of at least one case where the person got the fuel lines mixed up and it wouldn't start (line from the pump goes to the fuel rail, return line goes to the FPR).
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still dazed and confused
nope left nothing unpluged , all fuel lines are on corectly , checked it against my bronco that is running just to make sure i didn`t get anything backwards.
still not able to figure out why it will not build up any pressure in the fuel rail , my next thing is to replace the eec relay and see what that does if anything at all i know it has to be something i`m missing but can`t seem to figure out what i`m missing , even going to replace the condenser just to humor myself . i guess that if i throw enough things at it i will eventually get something right , but thanks for trying to help anyway
still not able to figure out why it will not build up any pressure in the fuel rail , my next thing is to replace the eec relay and see what that does if anything at all i know it has to be something i`m missing but can`t seem to figure out what i`m missing , even going to replace the condenser just to humor myself . i guess that if i throw enough things at it i will eventually get something right , but thanks for trying to help anyway
Senior User
Joined: Dec 2004
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From: Michigan
Originally Posted by rebocardo
See if you have spark, if not, then it is probably the TFI module.
Postmaster
Joined: Dec 2001
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From: UT
In your first post here you said that it had plenty of fuel pressure. Are you now saying that it doesn't? What is the fuel pressure? What is the fuel system doing? Will it run on starter fluid or will it start if you put a gas soaked rag in the intake or something like that?
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dazed and confused
well i think i am no longer confused , if i am right the culprit is the intake gasket , somehow or another it got pinched or was wrong from the get go but
after numerous tries i am almoest positive that that is it , going to replace sometime this week and keep my fingers crossed , hopefully this will correct the problem .
after numerous tries i am almoest positive that that is it , going to replace sometime this week and keep my fingers crossed , hopefully this will correct the problem .