I keep meaning to do some moding and contributing to this site, but it seems everytime I have the time or funds to do so, something catastrophic happens to my Capri.
Most recent problem has become quite a headscratcher. Been trying my best to diagnose myself without the use of the technicians I work with and without the use of this forum but it has led only to dead ends. So here I go, I'm officially asking for your help.
When I bought the car it had an occasional misfiring fit. Usually when I idled in drive at a stoplight after the engine had juuuust gotten to temperature. Replaced plugs. Better maybe, but not fixed. Cleaned cap and rotor, they were in good shape to begin with. It was a condition I could live with since it was only happening on occasion. So I saved my money for other projects on the car. Until... Two weeks ago car starts stalling out immediately atfer you throw it in gear. Idles splendidly in all other gears except drive. So what do I do? Replace wires. Nope, not it. Replaced fuel filter? Nope not it either.
So now I start my research. There is a service bulletin on tech Capri describing this exact issue. The fix is to cut a wire near the ECU. Except the wire was already cut so that wasn't the issue. I know vacuum leaks can wreak havoc on this car so I checked all the vacuum lines. They are all good. Upon inspection though, I found that the idle speed control valve (ISC/BPA) was unplugged. Certainly that must be the issue right? wWrong again kinda :/
When plugged In, the engine did not react as it should. It should have inceased in speed when actually all it did was nothing. So I replaced that and now that's operating properly. Except now I have high idlespeeds and the car is still stalling
Onto the throttle body... Gasket was broken. Fixed that. Throttle was slamming closed pretty hard so I adjust the dashpot. That's when Inoticed that the little screw to adust the valve position had be tampered with. It wasn't too far off from factory. (It was marked) fixed that. Tested with feeler gauge, there is room so its not getting jammed on throttle body. Used multi meter to get a reading of 654 kohms on the TPS which took several dozen times to get. Kept reading over load or 0 ohms. Suspicious...
Car still stalls when put into drive. I can force the car to run by keeping my foot on the gas but it runs really bad and stalls when you let it drop below 100rpm. Then you find white smoke coming out of throttle body. No check.engine light. TPS still only reads 654 kohms on occasion. The rest of the time its 0 ohms or over load. Car doesn't stall in drive when TPS is unplugged, it just idles at 500rpm and misfires badly.
Sorry for the novel. I think I better rrplace the TPS. any opinions as to what it could actually be?
