88 ford thunderbird turbo coupe. speedometer and tachometer

Tachometer / Speedometer Problems: - Ford Explorer and Ranger ...

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Jul 31, 2006 - 13 posts - ‎11 authors
Tachometer / Speedometer Problems: Under the Hood. ... upon restat the speedo goesto (is driven to) zero, the tach goes to ... 88 89 93 95 96 Aerostars ... in cold weather it seems to stick. but once the truck's interior warms up, .... 1995 Ford Explorer 4.0Automatic My Tach Quit Working And So Did My ... 5R55S harsh shifting; bump engaging reverse;
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1999 Ford Explorer , Erratic RPM Problem - YouTube

check that the turbo is actually working at the lower rpms.check to see if it is a variable vane turbo where the vanes for the turbine wheel can be altered to produce boost at lower rpms. The vanes are controlled by a actuator on the turbo and is controlled by a vacuum hose controlled by the ECM. The misfiring may be actually over fuelling ( mixture too rich as the boost is too low for the mixture)

check the fuel pressure, could be the fuel pressure regulator. also check fire if the fuel pressure is ok. weak fire could cause this

have you checked all fuses under the hood? have you checked the fuel pump relay? you may be able to swap the fuel pump relay with amother relay in the fuse box.are you getting power into and out of the reset switch? from there it goes to the fuel pump. if power is getting to the fuel pump and it has a good ground, the the pump is bad.

if the other motor controls are working it sounds like a bad switch

CHECK THE IDLE CONTROL VALVE

did anyone check the converters or mufflers as converters will come apart and land up in the mufflers.try taking off the front pipe off the engine and dirve it and see if there is any improvement!!

you might be able to find them in the ford motorsports catalog... you can get the catalog at the parts counter at any dealership. you might get lucky at a junk yard

Try this site they seem to have all that you need

http://www.carjunky.com/partstore/?N=5809&Nr=OR(AND(make:Ford,model:Thunderbird,year:1988),AND(universal:1))&Vi=4294965649+1616+10341&y=1988&mk=Ford&md=Thunderbird

its the ecu on the passenger side i went thru 3 trannys in 4 months and they finally looked for the problem because the tranny was under warenty and they had to keep fixing it for free