87 f150 6cyl,4 speed,starts fine but rpm will surge and stall until warmed up and then run fine,any suggestions,thanks.
87 f150 6cyl,4 speed 130,000miles,starts fine but rpm will surge up and down till stalls,restarts fine will run keeping idle up until warms up then no problems,any suggestions,thanks
Hummmmmmmmm. Sounds like a problem I use to encounter when I owned vehicles manufacturered in the 50 and 60's. Usually a carburator rebuild would fix it. Today, even lawnmowers encounter the same problem. A twenve buck kit from the local lawnmower repair shop usually fixes the problem. Is the vehicle carburated?
Really sounds like a problem with the old style automatic choke on older vehicles.
I would agree with you except it is EFI,no carb.
Does the vehicle have an IAC motor? It open and closes the ports adjusting the idle. Could be a heat/electrical issue. I'm really more at home with vehicles built two generations ago. My hair was darker also.
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