Windstar 3.8 Chugging/Missing Here’s the story . . . ANY help appreciated. 1998 Windstar 3.8L ~300,000 km
For quite some time (months) I noticed a slight chugging at low RPM’s. This was slowly getting worse over time, but curiously, would instantly clear up when the engine revs hit 2000. Seemed like a misfire at low revs?
Then, the chugging got much worse, and over the course of a few days spread through the RPM range. The vehicle became virtually undriveable, with the engine chugging and missing. The CEL comes on and flashes.
I tried unplugging the O2 sensors – no difference. At Advance Auto, the guy checked the codes and got O2 sensors codes (they were disconnected at the time) and missing on cyl; 1, 2 and 6. (Duh!) He said those were the only codes.
Although the plugs were fairly new double platinums, I changed all six plugs. Then the coil pack ($85!!!). Then the plug wires. Then the air filter. It seems to have improved slightly, but is still chugging and missing. I have NOT gotten to the root of the problem.
I have a very limited budget, and can’t afford to keep swapping expensive parts. I was wondering about the crankshaft position sensor, the crankshaft angle sensor, I’ve read here about the camshaft sensor(???) and is there a way to test the MAF without replacing it? (I can’t return the new coil pack or sensors once installed.)
Again, any thoughts or insights would be appreciated.
CraigK
Last edited by CraigRK; 05-13-2009 at 06:04 PM..
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