TerkelTurbo
New member
- Joined
- Oct 19, 2016
- Location
- Vermont
Hi Fellow Brickers,
To start, I want to say I?ve been avoiding this. The issues between me and my 240 have been long standing and for years, I?ve told myself we can work it out on our own. But I?m at my wits end and I?m tired of spending nights either sobbing into a gas-soaked rag or banging my head against the valve cover in frustration. So I?ve adorned my tough skin and I?m ready to sift through the chaf and scrutiny of the interweb to get some help. Let the couple?s counseling begin!
The car is a 1983 240 turbo. In short, I have no control fuel pressure. I am constantly running at system pressure, about 76 psi for my car, which is causing the car to run really lean. Starting is very rough- car will fire up, immediately die for multiple times before it eventually finds an extremely weak idle and sputters for a while before it finally warms up. Driving is slow with a lot of hesitation and since I?m running lean, the combustion temp is extremely hot to the point where my turbo and exhaust manifold glow bright red at night and I?m afraid my valves are looking like burnt toast.
The problem is I?ve changed my control pressure regulator 3 times, one of which is a completely refurbished and costed more than most of you would spend on a low mileage 240, and still no control pressure. I have correct voltage from the CPR wire harness and resistance across the CPR. I?ve adjusted my idle control set screw thing in my distributor extensively. My FV is buzzing away happily and the duty cycle is in the correct range according to the Bentley manual. I?ve cleaned out my fuel distributor and made sure I have no blockages in any of my fuel lines. I?ve also tested my return line at my gas tank and have good flow there. When I attach a volt meter to my O2 sensor and drive the car, it reads between .3-.6 volts at idle but on acceleration will drop to below .3 and won?t increase, basically no enrichment (which is consistent with running really lean? I think). Interesting thing is when I unplug the O2 sensor, voltage reads at .5, doesn?t change no matter what I do, and the car backfires a ton and doesn?t drive down the road.
Other things I have replaced on the car include both fuel pumps, the wiring harness, fuel pump relay, and all necessary fuses.
I?m hoping one of you can help me out. Is there something that I?m missing? Should there be another test I could do? Anything short of driving this car off of a cliff and buying a Saab (just kidding). I?m new to the k-jet, and car mechanics for that matter, so any advice would be much appreciated.
To start, I want to say I?ve been avoiding this. The issues between me and my 240 have been long standing and for years, I?ve told myself we can work it out on our own. But I?m at my wits end and I?m tired of spending nights either sobbing into a gas-soaked rag or banging my head against the valve cover in frustration. So I?ve adorned my tough skin and I?m ready to sift through the chaf and scrutiny of the interweb to get some help. Let the couple?s counseling begin!
The car is a 1983 240 turbo. In short, I have no control fuel pressure. I am constantly running at system pressure, about 76 psi for my car, which is causing the car to run really lean. Starting is very rough- car will fire up, immediately die for multiple times before it eventually finds an extremely weak idle and sputters for a while before it finally warms up. Driving is slow with a lot of hesitation and since I?m running lean, the combustion temp is extremely hot to the point where my turbo and exhaust manifold glow bright red at night and I?m afraid my valves are looking like burnt toast.
The problem is I?ve changed my control pressure regulator 3 times, one of which is a completely refurbished and costed more than most of you would spend on a low mileage 240, and still no control pressure. I have correct voltage from the CPR wire harness and resistance across the CPR. I?ve adjusted my idle control set screw thing in my distributor extensively. My FV is buzzing away happily and the duty cycle is in the correct range according to the Bentley manual. I?ve cleaned out my fuel distributor and made sure I have no blockages in any of my fuel lines. I?ve also tested my return line at my gas tank and have good flow there. When I attach a volt meter to my O2 sensor and drive the car, it reads between .3-.6 volts at idle but on acceleration will drop to below .3 and won?t increase, basically no enrichment (which is consistent with running really lean? I think). Interesting thing is when I unplug the O2 sensor, voltage reads at .5, doesn?t change no matter what I do, and the car backfires a ton and doesn?t drive down the road.
Other things I have replaced on the car include both fuel pumps, the wiring harness, fuel pump relay, and all necessary fuses.
I?m hoping one of you can help me out. Is there something that I?m missing? Should there be another test I could do? Anything short of driving this car off of a cliff and buying a Saab (just kidding). I?m new to the k-jet, and car mechanics for that matter, so any advice would be much appreciated.