Joined
·
6 Posts
Hello folks, having a rough idle issue. I'll start by what I have done to this van since I aquired it...
Replaced both head gaskets
Intake gaskets twice
Decarbonized the intake
Replaced plugs and coil
Fuel Filter
PCV valve
Ultrasonically cleaned injectors and replaced the number 4
Replaced entire front suspension and rear shocks
checked all vaccum lines
replaced alternator
checked fuel pressure
I currently need to replace one of the O2 sensors as it has popped a code.I imagine the coolant leak I had caused that. I managed to round it out because I couldn't get a good grip on it.
The problem I am having is an erratic idle and low speed driving. Highway speeds the engine runs smooth as silk. I ohmed the plug wires out and they seemed okay although they look like the original set and probably need to be replaced.
I'm not popping any other codes except for cylinder 4 misfire occasionally when it gets really bad. I can smell a strong fuel smell in the exhaust when it idles rough.
This seems to happen as it warms up. I used a timing light to check the spark and notice the spark seems to drop out sporadically, usually in time with the misfires. It happens on all cylinders in the front and I haven't had the cowl off latley to check the rear cylinders. I also tried this on my neigbors windstar to verify the timing light and it was working fine on his.
I'm at the end of my experience level here and would appreciate any advice.
I plan to verify my wires with my friends van as my wife won't let me throw any more money at this van at the moment. I have the O2 sensor and plan to remove the exhaust pipe this weekend to replace it. If anyone has any ideas as to what to check while i'm out there it would be helpful.
Thanks,
Luc
Replaced both head gaskets
Intake gaskets twice
Decarbonized the intake
Replaced plugs and coil
Fuel Filter
PCV valve
Ultrasonically cleaned injectors and replaced the number 4
Replaced entire front suspension and rear shocks
checked all vaccum lines
replaced alternator
checked fuel pressure
I currently need to replace one of the O2 sensors as it has popped a code.I imagine the coolant leak I had caused that. I managed to round it out because I couldn't get a good grip on it.
The problem I am having is an erratic idle and low speed driving. Highway speeds the engine runs smooth as silk. I ohmed the plug wires out and they seemed okay although they look like the original set and probably need to be replaced.
I'm not popping any other codes except for cylinder 4 misfire occasionally when it gets really bad. I can smell a strong fuel smell in the exhaust when it idles rough.
This seems to happen as it warms up. I used a timing light to check the spark and notice the spark seems to drop out sporadically, usually in time with the misfires. It happens on all cylinders in the front and I haven't had the cowl off latley to check the rear cylinders. I also tried this on my neigbors windstar to verify the timing light and it was working fine on his.
I'm at the end of my experience level here and would appreciate any advice.
I plan to verify my wires with my friends van as my wife won't let me throw any more money at this van at the moment. I have the O2 sensor and plan to remove the exhaust pipe this weekend to replace it. If anyone has any ideas as to what to check while i'm out there it would be helpful.
Thanks,
Luc