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5.2 dodge starts won't accelerate
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Erv
New User
Jan 18, 2012, 7:33 PM
Post #1 of 8
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5.2 dodge starts won't accelerate
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Have a 97 dodge ram van 3500 with 5.2 MPFI engine. Driving home last night and lost acceleration, had to keep pedal to floor to get home. Engine will start and idle smoothly but as soon as you depress throttle it bogs down and won't rev up. No engine codes. checked fuel pressure 47 lbs, checked TPS voltage--its ok, replaced fuel pump since pressure regulater is in fuel pump--no improvement. Fumes indicate unburned fuel like it's flooding. What else controls the throttle response???? Replaced PCM two years ago. Has new crank sensoe and cam sensor.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 18, 2012, 8:16 PM
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Re: 5.2 dodge starts won't accelerate
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Are you sure about that info? They didn't put that engine in that truck in that year.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Erv
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Jan 18, 2012, 8:32 PM
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Re: 5.2 dodge starts won't accelerate
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according to manuals and such you had a 5.2 (318) or the 5.9(360) available.
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Hammer Time
Ultimate Carjunky
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Jan 18, 2012, 8:37 PM
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Re: 5.2 dodge starts won't accelerate
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I found it. It was available in the van only, not the pick up.
Is this a "drive by wire" system?
You never had any check engine light?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Erv
New User
Jan 19, 2012, 12:24 AM
Post #5 of 8
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Re: 5.2 dodge starts won't accelerate
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in the past I've had check engine lights show up. hooked scanner to it shows no codes will check again in morning. Haven"t checked MAP sensor yet, don't know if that will affect it or not? Could a bad cat cause tis?h
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Hammer Time
Ultimate Carjunky
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Jan 19, 2012, 4:01 AM
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Re: 5.2 dodge starts won't accelerate
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If the check engine light came on, then there should be a code stored if the system is working properly.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Jan 19, 2012, 6:00 AM
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Re: 5.2 dodge starts won't accelerate
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A restriction in the exhaust could cause that. Is the engine misfiring at idle?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jan 19, 2012, 6:03 AM)
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Erv
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Jan 19, 2012, 5:26 PM
Post #8 of 8
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Re: 5.2 dodge starts won't accelerate
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Corredt you are. Checked o2 output with as mush throttle as it would take and had near a volt of output. Cut exhaust pipe behind cat and cleaned out debris. Welded pipe back in place--eureka it solved the problem.
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