Cees Klumper
Active Member
- Joined
- Nov 4, 2019
- Messages
- 189
- Reaction score
- 134
- Points
- 43
- Location
- De Luz, CA (near Camp Pendleton)
- Vehicle Year
- 1990
- Make / Model
- Bronco II XLT
- Transmission
- Automatic
I went to start up my '90 2.9 Bronco II just now, and it ran really rough, sputtering, missing and had no power. It did this once before but straightened itself out, and I thought it would straighten itself out as I started driving. However, it did not smoothen out, on the contrary it started running rougher and, worse, started blowing a lot of blue smoke. I stopped the car and as I shut the engine off, I heard what sounded like faint knocking noises from under the hood. Opened the hood, and saw some what seemed like coolant on top of the driver's side exhaust manifold. I thought perhaps it had blown a head gasket, although the coolant reservoir was at its normal level and the smoke was blue, not white or grey.
After letting it sit for maybe 10 minutes I started it up again, and it ran a bit better, and there was initially no smoke. However, after maybe 30 seconds it started to run really rough again and the blue smoke re-appeared. I disconnected the MAF and then the TPS, but there was no change.
For what it's worth, it felt like the engine was firing / igniting at the wrong times. The liquid (coolant?) on top of the manifold seemed to be coming through the connection at the exhaust downpipe, rather than through the head gasket, if that's even possible, but I could not see where else it could be coming from.
I drove the car earlier today and it ran great. It seems strange that, after sitting for a half a day, it would develop such a major problem. The one thing I did do during the day, was fix two broken wires under the dash to the cruise control stalk, and I turned the ignition on and off several times in the process. So I thought maybe one or more leaking injectors may have fouled out spark plugs? The blue smoke has me really concerned. Could it be one of the main sensors to the ECU has failed? I checked for codes a week ago, and it came back all clean at that time.
Grateful for any suggestions.
After letting it sit for maybe 10 minutes I started it up again, and it ran a bit better, and there was initially no smoke. However, after maybe 30 seconds it started to run really rough again and the blue smoke re-appeared. I disconnected the MAF and then the TPS, but there was no change.
For what it's worth, it felt like the engine was firing / igniting at the wrong times. The liquid (coolant?) on top of the manifold seemed to be coming through the connection at the exhaust downpipe, rather than through the head gasket, if that's even possible, but I could not see where else it could be coming from.
I drove the car earlier today and it ran great. It seems strange that, after sitting for a half a day, it would develop such a major problem. The one thing I did do during the day, was fix two broken wires under the dash to the cruise control stalk, and I turned the ignition on and off several times in the process. So I thought maybe one or more leaking injectors may have fouled out spark plugs? The blue smoke has me really concerned. Could it be one of the main sensors to the ECU has failed? I checked for codes a week ago, and it came back all clean at that time.
Grateful for any suggestions.
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