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1993 302 5.0 f150 starting problem

  • Josh3089
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02 Mar 2019 15:23 #27511 by Josh3089
1993 302 5.0 f150 starting problem was created by Josh3089
I have a 1993 f150 5.0 have changed the distributor spark plugs ignition control module ignition switch timing is correct coil is good pulling spout doesn't work and fuel shut off switch is good has spark and fuel running out of ideas to try

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02 Mar 2019 16:07 #27513 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
check your emmissions system, make sure EGR is not shot. when you say you have spark do you have sparks to all plugs? how did you determine you have fuel? if yo have spark and fuel the only thing missing is compression and air. can u be more specific, whats happening when cranking, is it poping backfiring, nothing at all, was it running good recently, do you have any codes. ?

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02 Mar 2019 16:10 #27515 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
why did u cchange the distributor? not knowing your mechanical aptitude, my number one suspect would be distributor not in properly (even the best miss)< or 2 a chinese aftermarket that was junk out of the box.. LOTS of mr changs parts no worky good on these old trucks..

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02 Mar 2019 17:44 #27527 by Josh3089
Replied by Josh3089 on topic 1993 302 5.0 f150 starting problem
Will do nothing just cranks no backfire or nothing even on starting fluid compression is good and only changed distributor because we tested for power coming out of the distributor and had no power coming out of it and yes spark to all plugs and fuel at the fuel rail and in the cylinders

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02 Mar 2019 17:45 #27528 by Josh3089
Replied by Josh3089 on topic 1993 302 5.0 f150 starting problem
Yes was running one day went out to start it the next day and just cranked

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02 Mar 2019 22:33 #27531 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
take valve cover off and see if valves are moving up and down by looking at rocker arms. check for compression at cylinders.

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02 Mar 2019 22:34 #27532 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
if u have compression you may have a crankshaft or camshaft position sensor went out, can you scan it for codes?

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02 Mar 2019 22:36 #27533 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
if crank or camshaft position sensor is bad, could be firing but at wrong time, intermittent firing, ect.

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03 Mar 2019 06:10 #27544 by Josh3089
Replied by Josh3089 on topic 1993 302 5.0 f150 starting problem
It's a 93 the crankshaft position sensor is the pickup coil in the distributor and I have put a new duralast gold distributor in and compression is good and it doesn't fire at all it doesn't even fire on starting fluid

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03 Mar 2019 11:41 - 03 Mar 2019 11:43 #27547 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
in your initial post you said it had no spark? when you say fire do you mean start?
Last edit: 03 Mar 2019 11:43 by wacoeagle.

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03 Mar 2019 11:47 #27548 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
sometimes ignition wont pop if fuel isnt there, do you hear the fuel pump whirrr when you turn the key to run? open gas cap or have someone help listen or turn key for you. fuel pump fuse... if no whirrr, maybe fuel pump relay. when you try to start it see if your getting voltage to your coil

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03 Mar 2019 11:51 #27549 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
yes or no. are the SPARK PLUGS SPARKING when crank the engine over.

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03 Mar 2019 12:43 #27551 by Josh3089
Replied by Josh3089 on topic 1993 302 5.0 f150 starting problem
The initial post said it has spark yes the plugs spark when it cranks and yes the fuel pump runs on both tanks

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03 Mar 2019 15:09 #27558 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
I would pull the distributor cap and make sure the wires from the signal coil are plugged in good, make sure all connectors are plugged in snugly . it sounds like a timing problem. if your gettng spark, and you have compression, if it is firing at the correct time, it has to run,. are you 100 PERCENT positive the distributor was put in correctly, can you verify . pull number 1 plug and pull valve cover off, bump it till piston gets to tdc, and rotor is pointing to number one plug wire, make sure both valves on number one are closed.
The following user(s) said Thank You: Noah

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03 Mar 2019 15:13 #27560 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
also how did you time the new distributor?

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03 Mar 2019 15:17 #27561 by wacoeagle
Replied by wacoeagle on topic 1993 302 5.0 f150 starting problem
on chevys there is a wire that must be unplugged when u set base timing, then you plug the wire back in, and computer takes over. not sure if Ford uses same system.. its called a bypass ignition system on chevys.
scanner danner has some good vids on you tube abt ignition systems.

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03 Mar 2019 15:52 #27563 by Josh3089
Replied by Josh3089 on topic 1993 302 5.0 f150 starting problem
We put the number 1 cylinder to tdc and pulled the distributor and put the new one in in the same exact spot it's not a timing issue and it doesn't fire or backfire can I get someone else to answer possibly because at this point I have repeated myself a few times and your still going to conclusions that we have already checked

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