Truck is not accelerating correctly?
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Truck is not accelerating correctly?
I have a 1990 F-150 V-8 5.0. Lately my truck has not been accelerating correctly. Most of the time when i push down on the gas pedal it accelerates to around 25 mph normally and then it just stops accelerating and i have to floor the pedal before it will start acclerating. When i get on the highway it is also pushing 3500 rpm when im cruising at around 60mph it usually is around 2000 rpm. i recently replaced the fuel filter.
Does anybody know what could be causing this?
Does anybody know what could be causing this?
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Joined: Nov 2004
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From: jax. florida
Start off with pulling the codes...Go to www.fordfuelinjection.com and it will tell you how and what the codes mean..
Also when was the last complete tuneup...????
Also when was the last complete tuneup...????
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<TABLE class=tborder cellSpacing=1 cellPadding=4 width="100%" align=center border=0><TBODY><TR title="Post 3097490" vAlign=top><TD class=alt1 align=middle width=125>chmath</TD><TD class=alt2>Start off with pulling the codes...Go to www.fordfuelinjection.com and it will tell you how and what the codes mean..
Also when was the last complete tuneup...????</TD></TR></TBODY></TABLE>
I don't know when the last tuneup might have been. I bought the truck back in May. Where can i go to get the codes pulled?
Also when was the last complete tuneup...????</TD></TR></TBODY></TABLE>
I don't know when the last tuneup might have been. I bought the truck back in May. Where can i go to get the codes pulled?
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Joined: Nov 2004
Posts: 165
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From: jax. florida
try your local auto parts store i.e. AutoZone ,Advavance auto parts ,ect....most of them will do it at no charge ...just call and ask them if they can pull the codes for you... You can pull the codes yourself ...just go to www.fordfuelinjection.com and it will tell you how to do it and also what the codes mean...
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Over the weekend i went to Auto Zone and had them pull the codes the only code that came up was code 32. fordfuelinjection.com said that it was "EVP circuit below minimum voltage of 0.24 volts." Does any body know what that means? The guy at auto zone also said to clean out the throttle box. He gave me some cleaner for that. I cleaned it out and it was pretty dirty. It accelerated a little bit better but the problem still remans a little bit.
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Joined: Oct 2005
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EVP is an EGR position sensor. It reports the physical position of the EGR valve to the computer. Get a haynes manual and check the voltages and resistances it specifies in the EVP section. Also apply vacuum to the EGR to see if it is stuck. If you have to replace it, only replace it with Motorcraft. I've found other brands send inaccurate voltages to the PCM.
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Joined: Oct 2004
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From: Wetaskiwin, Alberta
I'm gonna go with quicklook2 on this one. If fixing your EVP circuit problems doesn't improve the driveability of your truck I would check the cat to see if it is partially plugged off. This will definitely lead to the symptoms that you describe. I would also venture to guess that your truck could stand a full tune up and general cleaning of the intake and combustion zones. ie: clean the throttle body, IAC, upper combustion chamber cleaning (maybe some Seafoam) etc. etc.
Cheers!
Mike
Cheers!
Mike
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