1990 7.3 idi no start
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Tuned
Joined: Nov 2007
Posts: 276
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1990 7.3 idi no start
I have a 1990 superduty with the 7.3 idi that ive been trying to start but wont.
it will crank and sonetimes try to pop but wont fire with charged batteries. Wont even start with either or anything else.
Ive loosend the injector caps to see if their is air in the system and half the caps will bleed out fuel, no air pressure comes out of the shraeder valve aftwr cranking and testing it.
It has a fuel tank of fuel
Changed the icp(sensor in the timing cover as i jad a new one anyways).
changed the fuse under the dash
The truck has sat sinve january and tried to stsrt then but died as the batter was weak and hasnt wanted to start since(even with new batteries.
The glow plugs work, same with the block heater thats plugged in.
Would the injector pump be shot? As im leaning towards that.
it will crank and sonetimes try to pop but wont fire with charged batteries. Wont even start with either or anything else.
Ive loosend the injector caps to see if their is air in the system and half the caps will bleed out fuel, no air pressure comes out of the shraeder valve aftwr cranking and testing it.
It has a fuel tank of fuel
Changed the icp(sensor in the timing cover as i jad a new one anyways).
changed the fuse under the dash
The truck has sat sinve january and tried to stsrt then but died as the batter was weak and hasnt wanted to start since(even with new batteries.
The glow plugs work, same with the block heater thats plugged in.
Would the injector pump be shot? As im leaning towards that.
Cargo Master
Joined: Oct 2012
Posts: 3,072
Likes: 48
From: California
I have a 1990 superduty with the 7.3 idi that ive been trying to start but wont.
it will crank and sonetimes try to pop but wont fire with charged batteries. Wont even start with either or anything else.
Ive loosend the injector caps to see if their is air in the system and half the caps will bleed out fuel, no air pressure comes out of the shraeder valve aftwr cranking and testing it.
It has a fuel tank of fuel
Changed the icp(sensor in the timing cover as i jad a new one anyways).
changed the fuse under the dash
The truck has sat sinve january and tried to stsrt then but died as the batter was weak and hasnt wanted to start since(even with new batteries.
The glow plugs work, same with the block heater thats plugged in.
Would the injector pump be shot? As im leaning towards that.
it will crank and sonetimes try to pop but wont fire with charged batteries. Wont even start with either or anything else.
Ive loosend the injector caps to see if their is air in the system and half the caps will bleed out fuel, no air pressure comes out of the shraeder valve aftwr cranking and testing it.
It has a fuel tank of fuel
Changed the icp(sensor in the timing cover as i jad a new one anyways).
changed the fuse under the dash
The truck has sat sinve january and tried to stsrt then but died as the batter was weak and hasnt wanted to start since(even with new batteries.
The glow plugs work, same with the block heater thats plugged in.
Would the injector pump be shot? As im leaning towards that.
Have you had your batteries checked? I once had a bad cell in one of my batteries, and even though the other battery was working fine, that bad cell would kill the whole system.
If you have fuel dribbling out of the injector lines, then I suspect your IP is fine. It could be a stuck metering valve though. Here's a video showing how to fiddle with the valve and you might get it unstuck. https://www.nickpisca.com/diesel/fue...injector-pump/
i ain't rite
Joined: Mar 2005
Posts: 65,515
Likes: 5,567
From: Marlboro Mental Hospital.
these engines do not have an ICP sensor.
do you mean the tach sensor?
how fast is it turning over? a bad starter will keep the engine from starting.
here are two videos. first is a bad starter at 70 degrees:
and this is a new starter at 40 degrees:
two weeks after the first video, the truck would not turn over fast enough to fire off, so i was forced to replace the starter in the cold.
do you mean the tach sensor?
how fast is it turning over? a bad starter will keep the engine from starting.
here are two videos. first is a bad starter at 70 degrees:
and this is a new starter at 40 degrees:
two weeks after the first video, the truck would not turn over fast enough to fire off, so i was forced to replace the starter in the cold.
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mountian man
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Feb 6, 2012 08:51 PM
