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Hello to the BrickBoard,
After several days of absolutely perfect running, I decided to do the water and Seafoam carbon-cleaning treatment on my 85 244 GL, B230F with LH 2.2, for curiousity more than anything. I used the FPR vacuum port on the front side of the throttle body to inject both liquids.
After completing the water torture treatment (My nine year old son Houston assisted, and loved the billowing steam and smoke clouds), I followed up with a SeaFoam treatment per the manufacturers instructions. I then drove the vehicle around for 10 minutes or so, maintaining 3K rpms or higher. As others have posted, I noticed a positive change in the motor, and feel it was a worthwhile investment of time and money. After arriving back at the house, I let the engine idle for a few minutes (she was purring beautifully, better than ever IMHO) then shut her down for the night.
The next morning, cranking the engine resulted in a few seconds of running, then stalling. Further attempts to start had zero success.
Is there ANY way this treatment could result in a repeatedly hard start followed by 2-3 seconds of running, then stalling with VERY wet spark plug, "flooded" conditions, the following morning after the treatment?
AMM has been gone over repeatedly, and passes all of Bentley's checks.
The Fuel Pressure Regulator diaphragm is not leaking fuel into the Throttle Body.
The Throttle Body is clean as a whistle, and adjusted per Bentley.
The coil is firing beautifully, each spark plug is receiving a crisp bluish spark, timing is 12 BTDC, and the fuel pump is definitely providing fuel to the injectors (operating fuel pressure is unknown, unfortunately)
Suspect the coolant temp sensor isn't working properly, and the injectors are flooding the cylinders with fuel, drowning the spark plugs (the plugs are literally wet with fuel after two or three seconds of cranking the starter. I have pulled them out, blown them off with compressed air, put them back in...four or five times. Each time she catches for about two or three seconds, attempts to run, then dies.
If the coolant temperature sensor is faulty, is there a way to temporarily bypass the signal so that the Control Unit does not signal the injectors to flood the engine the cylinders with fuel?
I had her running so good the night of the treatment...I just can not discover what is causing this no start condition.
Please offer any insights you may have...I am tired of pulling those plugs for two seconds of running!
Many thanks to everyone on the Brickboard for the invaluable assistance you all offer!
Jackson Sadler
First time Brickboard poster, Longtime Volvo Fan
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