1991 4.9L ENGINE STOP WHEN ACCELERATE
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Joined: Sep 2013
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From: Guadalajara, Mexico.
1991 4.9L ENGINE STOP WHEN ACCELERATE
Hello enthusiasts, coming home my truck began to fail, the engine on and stays well but when accelerated stops, the fuel has a pressure of 47 PSI, and check the TPS and is working well, I will gradually phased out all lines empty since they are the originals, any idea what else should I check?
Logistics Pro
Joined: Mar 2005
Posts: 4,698
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From: Mexico, Missouri
Does it just die, like turning the key off or just go to hacking or bog down? I assume it idles fine, does it die only when accelerating?
Have you checked for codes? They exist even if the CEL isn't on.
Have you checked for codes? They exist even if the CEL isn't on.
Logistics Pro
Joined: Mar 2005
Posts: 4,698
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From: Mexico, Missouri
Idled fine then. Lightly accelerating is ok, medium to wide open accelerator kills the engine. Is this apparent when in gear or just in park or neutral?
Have you checked for codes? Sounds like perhaps the timing isn't advancing properly... Or clogged catalytic converter
Only ideas I have now..maybe other knowledgeable members will reply.
Have you checked for codes? Sounds like perhaps the timing isn't advancing properly... Or clogged catalytic converter
Only ideas I have now..maybe other knowledgeable members will reply.
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Joined: Oct 2013
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You can pull codes using the CEL, a voltmeter, or a test light if you do not have a code reader. The instructions are at Fuel Injection Technical Library » How To Run a Self-Test as are the connections.
Another thought is a carbon track in the distributor cap or on the distributor rotor. I had a distributor rotor that burned through under the spring when I was in Tucson, and it acted almost exactly like your truck. It idled well, but when I tried to accelerate it stopped.
Another thought is a carbon track in the distributor cap or on the distributor rotor. I had a distributor rotor that burned through under the spring when I was in Tucson, and it acted almost exactly like your truck. It idled well, but when I tried to accelerate it stopped.
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From: Guadalajara, Mexico.
thanks for the tips, had not had time to check out the truck but today and tomorrow I will, if I can not correct the fault volvere to write and when corrected also I will write
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