RPM problem
Thread Starter
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Junior User
Joined: Apr 2003
Posts: 50
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From: Nanaimo B.C.
RPM problem
Hi folks,
I own an 87 F150 with the 4.9 litre engine. The problem I am having lately is that when I depress my clutch pedal quickly my RPM drops down to about 300 RPM and then a second later climbs up to about 700 RPM. I have also stalled out when going down a hill and depressing the clutch pedal. I also have been having alot of rough idle lately. The weird thing is that the truck runs fine with no lag or stuttering until I depress the clutch. Has anybody heard of or experienced this type of problem and if so what could be causing it?
Thanks in advance
F.O.G.
I own an 87 F150 with the 4.9 litre engine. The problem I am having lately is that when I depress my clutch pedal quickly my RPM drops down to about 300 RPM and then a second later climbs up to about 700 RPM. I have also stalled out when going down a hill and depressing the clutch pedal. I also have been having alot of rough idle lately. The weird thing is that the truck runs fine with no lag or stuttering until I depress the clutch. Has anybody heard of or experienced this type of problem and if so what could be causing it?
Thanks in advance
F.O.G.
Thread Starter
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Junior User
Joined: Apr 2003
Posts: 50
Likes: 0
From: Nanaimo B.C.
Thanks for the tip. I crawled under the dash and checked the wiring like you said. All the wires appear to be in good shape and the clutch isn't comming anywhere near any of them. After I did that I went and dug out my code reader and did a diagnostic. It came back with my TPS is below minimum voltage and my MAP sensor is out of range. Could this be the problem and can you adjust the TPS or do you have to replace it?
Thanks in advance
F.O.G.
Thanks in advance
F.O.G.
