Discussion
Check the waste gate actuator hose if it is not hooked up the waste gate will not function. When this happens, the turbo will kick in(about 3K rpm) it will go to over 1 bar boost then engine management will sense the over boost then cut the fuel flow till the over boost condition does not exisit to prevent engine damage. Feels like you are running out of gas and revs fine under no load, no turbo boost conditions as you will only turbo boost when VSS tells the managment you are under way. The hose is kind of near the area you were working around when replacing the chargecooler pump, it is possible that the hose just fell off as it is just pressed on the waste gate actuator fitting. From the symtoms you describe it sounds like it. Or you can sell me you your broken Esprit for a cheap price. hahahaha. let me know if it was the problem
Calvin 90 SE
Calvin 90 SE
The Vehicle Speed Sensor is located on the right rear hub and relays vehicle speed info to management system. Turbo boost will not occur unless the car is in motion. I don't think there is any other device that tells the car how fast it is in motion other than the VSS. Hooking up a hand vac pump should trigger the waste gate to check if it is working. Check the vac hose for splits, Also I have seen the hose just vibrate off after it has been checked and have been told if the engine hiccups or it can blow off vac lines like crazy. Symtoms indicate your problem is directly related to an over boost cut off condition. see if the stalling occurs after the turbo goes to +1 bar, if it does it is a wastegate failure of some type. The waste gate itself or the actuator/hose. Hope it is the hose as it is the least expensive.
Calvin 90 SE
Calvin 90 SE
Before I sent out my plea for help the car had left me stranded. That is when I set out to replace components. After which I couldn't get the thing to run right. However, what I had failed to examine was the spark plugs. The spark plugs had become covered with soot from whatever it was that was wrong with the engine management system. It was no wonder that it wouldn't run right. I sand blasted the plugs, reset the ECM again, and now it seems to run good. It still has a bit of a hesitation, and I'm struggling to get it to idle a little better, and I'm also still getting fault code 21 (TPS voltage high), but it will now boost, and accelerate more like what one would expect.
So, I suspect that you were right. It was the result of some boost cut-off condition. My guess is that the ECM was getting confusing signals (stemming from the terrible engine performance) that produced the boost cut-off condition -- maybe it was confusing signals from the TPS and the MAP sensors.
Anyway, I think that I am almost there. Any tips on the proper installation of a TPS sensor? It seemed easy enough to do. But I haven’t been able to get rid of the fault code 21. It keeps coming back after a reset of the ECM. I thought that the ECM was supposed to learn where to set the idle by means of the IAC circuit. There’s nothing to adjust...is there?
Thanks for your help.
So, I suspect that you were right. It was the result of some boost cut-off condition. My guess is that the ECM was getting confusing signals (stemming from the terrible engine performance) that produced the boost cut-off condition -- maybe it was confusing signals from the TPS and the MAP sensors.
Anyway, I think that I am almost there. Any tips on the proper installation of a TPS sensor? It seemed easy enough to do. But I haven’t been able to get rid of the fault code 21. It keeps coming back after a reset of the ECM. I thought that the ECM was supposed to learn where to set the idle by means of the IAC circuit. There’s nothing to adjust...is there?
Thanks for your help.
Oh well that would do it if the plugs were crusty. If the car sat for a while the injectors could also be crusted over and not spraying right. You may have to remove them and see if they are spraying right with a pump. If it dribbles drops instead of a fine mist then you have to clean or replace them. If cleaning don't do anything to enlarge the opening like poking something in it. Also drain the fuel tanks if the gas is old. Nothing like crappy gasoline for the ECM learn off of. You may also have debris in the fuel filters. Also check the damm fuel ventalator line that runs above the rear window under the carpet piece. The hose connects the two fuel tanks together at the filler necks (back side of the rear hatch gutter). It usually disintergrates on touch if it is the yellow hose. If you should accidentally overfill on fuel up or take sharp turns with a full tank it will spill raw gas into the engine bay area under the interior quarter window covers.
Calvin 90 SE
Calvin 90 SE
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