Acceleration issue
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Acceleration issue
1989 F-250 Custom V8 351W 5.8L
Vehicle starts right up but won't accelerate in 1st or 2nd gear. Has trouble reversing without dieing. I know the catalytic Convertor is clogged, is this the only thing that would cause this issue? Could the EGR valve be stuck open or closed?
Even if it's in drive and I hold the brake all the way and push the gas pedal RPMs won't go up. In park the RPMs go up just fine. Please help thanks
Vehicle starts right up but won't accelerate in 1st or 2nd gear. Has trouble reversing without dieing. I know the catalytic Convertor is clogged, is this the only thing that would cause this issue? Could the EGR valve be stuck open or closed?
Even if it's in drive and I hold the brake all the way and push the gas pedal RPMs won't go up. In park the RPMs go up just fine. Please help thanks
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
How do you know the cat is clogged?
What is the fuel pressure? Low fuel pressure is the most likely cause.
Stuck EGR won't cause your problem, it would stumble at idle but clear up at rpm
While you're at it pull codes and post up what you get.
What is the fuel pressure? Low fuel pressure is the most likely cause.
Stuck EGR won't cause your problem, it would stumble at idle but clear up at rpm
While you're at it pull codes and post up what you get.
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The cat gets red hot after a little bit of driving. I don't know how to pull codes even reading the guides on engine off key on type stuff. Paper clip and all that
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Would they sell this at orielys or autozone?
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Da 'Zone does for sure: Innova/Ford OBD1 code reader 3145- Read2Reviews onInnova #3145
I have seen Equus and Innova brand name used for the same tool.
I have seen Equus and Innova brand name used for the same tool.
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Last night I installed a tachnometer just for fun. Took a short half mile drive down to the store. Came out started the truck up and all my lights went out, interior & exterior, except the front right headlight. So that's cool LOL
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Cargo Master
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From: British Columbia
Also check the fuel pressure regulator. The diaphragm can fail in it allowing fuel to be sucked into the intake manifold directly.
It's easy to test, just disconnect its vacuum line from the intake and apply suction to the line. If fuel comes out, it's no good.
It's easy to test, just disconnect its vacuum line from the intake and apply suction to the line. If fuel comes out, it's no good.
Tuned
Joined: Jan 2015
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Check your codes, definitely, but your cat shouldn't glow. Back pressure can affect intake, etc. so if your exhaust isn't flowing your O2 sensor isn't able to do it's job, or may not be working anyway, and it could be telling the computer to run rich. Richness = high fuel usage. If it's high enough you can smell it. Test your backpressure, or if you know the cat is truly clogged, replace it. You can also disconnect your exhaust and run it for a bit that way to see what difference it makes.
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