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If you have fire and gas can the ECU still be bad?

Tiny
DLEE7022
  • MEMBER
  • 1993 FORD E-SERIES VAN
  • 245,000 MILES
This van has a 4.9l 6 cylinder in it, it will turn over until it kills the battery. I pulled all the plugs checked gap, spark, and they had the right gap had spark and there was a lot of fuel on the plugs. I sprayed them down with starting fluid to clean them up. Doesn't start. Just a few days before this all happened I had installed another alternator bc the other one was going bad. Not sure if maybe that might have been the wrong alternator with too many output amps and possibly sent a serge to the ecu. Any ideas would be greatly appreciated, I'm about ready to throw a match in the tank.

P.S. I have gotten it to start a couple of times since it started the problem and idles fine but runs crappy when driving. It will run until you turn it off and when you try to crank it again its hard to start if it even will.
Thanks again
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Sunday, January 22nd, 2012 AT 11:00 PM

24 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
So it has spark? Have you tried holding pedal to floor when it wont start?
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Sunday, January 22nd, 2012 AT 11:29 PM
Tiny
DLEE7022
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  • 13 POSTS
Yeah it has spark, have held the pedal to the floor doesn't make a difference. It even took the air box loose and sprayed that starting fluid in the throttle body still acted no differently.
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Sunday, January 22nd, 2012 AT 11:38 PM
Tiny
FIXITMR
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Try compression test or stop fuel supply and let it dry out then ad some spray start while cranking?
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Monday, January 23rd, 2012 AT 4:51 AM
Tiny
DLEE7022
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  • 13 POSTS
Checked compression all cylinders around 125psi. Pulled fuse to the fuel pump cranked it over for about min and a half sprayed more starting fluid in the throttle body, no change.
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Monday, January 23rd, 2012 AT 7:26 PM
Tiny
DLEE7022
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  • 13 POSTS
Ok just got back from the pos I finally got it to start had to hold pedal to the floor and its running but still running very crappy
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Monday, January 23rd, 2012 AT 8:34 PM
Tiny
FIXITMR
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More amps from alt wont hurt but more volts could. Should not be higher than 15v preferrably 14v.
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Tuesday, January 24th, 2012 AT 12:42 AM
Tiny
DLEE7022
  • MEMBER
  • 13 POSTS
So where do I check my voltage from with my voltage meter
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Tuesday, January 24th, 2012 AT 12:57 AM
Tiny
FIXITMR
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At battery while running.
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Tuesday, January 24th, 2012 AT 4:34 AM
Tiny
DLEE7022
  • MEMBER
  • 13 POSTS
I can't do that when I shut it off yesterday it wouldn't crank back up. Would not getting enough amps out of the alternator cause it to do what its doing?
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Tuesday, January 24th, 2012 AT 2:43 PM
Tiny
FIXITMR
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Battery has to be 12v to run system. Usually reads at least 12.5 when not running.
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Tuesday, January 24th, 2012 AT 4:09 PM
Tiny
DLEE7022
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  • 13 POSTS
The battery has 12.4VDC across it
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Tuesday, January 24th, 2012 AT 4:13 PM
Tiny
FIXITMR
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I had a 91 tempo (ford) with 300k that was doin the same thing your van is. Way too rich to start, flood right out. I put a momentary switch on the fuel pump and used it to stop pump while cranking till it started then let pump run. Never did take time to figure it out. It probably had low compression like your van. Dont know if that was part of problem.
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Tuesday, January 24th, 2012 AT 4:15 PM
Tiny
DLEE7022
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  • 13 POSTS
So you think I should just do that?
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Tuesday, January 24th, 2012 AT 4:23 PM
Tiny
FIXITMR
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Voltage sounds right. Butyou wont know till started. My tempo ran fine after starting. Yours does not. I rigged it as temp fix so I could drive and ended up leaving that way.
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Tuesday, January 24th, 2012 AT 5:18 PM
Tiny
DLEE7022
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Do you think that it could just always be getting too much fuel and cause it to flood out even when running? It idles fine and if you drive it it'll drive as long as you don't push the pedal more than half way
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Tuesday, January 24th, 2012 AT 5:39 PM
Tiny
FIXITMR
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If it was running to rich it would turn plugs sooty black. You have spark is it strong and blue? Will it jump a bigger gap then plug gap?
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Wednesday, January 25th, 2012 AT 5:22 AM
Tiny
DLEE7022
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  • 13 POSTS
Spark is orange in most of them a little blue in a couple of them
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Wednesday, January 25th, 2012 AT 3:56 PM
Tiny
FIXITMR
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Check coil for 12v while cranking.
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Thursday, January 26th, 2012 AT 12:04 PM
Tiny
DLEE7022
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Ok will check that later today.
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Thursday, January 26th, 2012 AT 12:26 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Dlee, how was that voltage at the coil?
Have you checked fuel pressure yet?
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Friday, January 27th, 2012 AT 10:58 PM

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