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850 turbo code 4-4-3 850 1995

posted by por356s on Sat May 3 03:47 CST 2003
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Help .. I'll adimit it.. I'm a rookie engine cleaner .. I sprayed the motor down. engine started running rough. I got the engine service light. I made it home, and noticed water in my sparkplug cylinders (alot). I then removed all the water and even replaced the plugs. here's the problem. The turbo gauge has always stayed in the nuetural position (center) during idle .. It now runs a 1/4 into the negative (to the left). And the while driving will not exceed the 1/4 mark on the positive (to the right)??? HELP .. I now get the code 4-4-3 and no other... ????? Thanks Curtis

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850 turbo code 4-4-3 850 1995

posted by someone claiming to be Mike H on Sat May 3 05:51 CST 2003 [RELATED]

How soon did you start the car after spraying the engine?

Check that your distributer cap didnt crack. That happened to me a long time ago with a chrysler. Ran rough from the contacts arching inside the cap.
Part was cheap but it took awhile to figure that one out. (since the crack was hard to see)
Now if if ever clean the engine, I put plastic bags the electronics and then I dont start the car for several hours.

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850 turbo code 4-4-3 850 1995

posted by Hamfisted on Sat May 3 05:27 CST 2003
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DTC 4-4-3 is a problem with catalytic converter efficiency for a number of reasons. Efficiency is monitored by the ECM measuring readings between the front O2 sensor and the rear O2 sensor. The book says fault can be caused by Uneven compression, Air leak in the intake system, Air leak in the exhaust system, Incorrect fuelpressure, defective cat converter. Did you get a 4-3-5 or 4-3-6 code ? This would indicate one of the O2 sensors bad. Is the motor still running rough ? If it smooths out try clearing the 4-4-3 code and see if it comes back. Check for a loose vacuum hose. Since you are now seeing odd readings on your Turbo gauge look closely in that area. You may end up doing a compression check if you can't find anything else.

Mike

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850 turbo code 4-4-3 more info ..... 850 1995

posted by Hamfisted on Sat May 3 15:59 CST 2003
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This is what the book says :

Code 4-4-3 (TWC Efficiency... "Three Way Converter")
1) Check for other codes. If any code for misfiring is stored
(Codes 4-5-1, 4-5-2, 4-5-3, 4-5-4, 4-5-5, 5-4-2, 5-4-3, 5-5-1, 5-5-2,
5-5-3, 5-5-4, 5-5-5, 5-4-4 or 5-4-5) perform that testing first.
If Codes 4-3-5 or 4-3-6 are stored, perform testing for that code first.
If none of the above codes are stored, go to next step.

2) Perform a compression check on all cylinders. Repair as
necessary. If compression is okay, go to next step.

3) Check for air leakage in intake system. Repair as
necessary. If there is no air leakage in intake system, check for air
leakage in exhaust system. Repair as necessary. If there is no air
leakage in exhaust system, check fuel and residual pressure. Repair as
necessary. If fuel and residual pressure are okay, retest using NEW Cat Converter.

Mike

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