Hello, I have my 1990 240 that I bought new. I upgraded the ECU years ago from the bad 556. I have replaced injectors, MAF, all vacuum lines, TPS, IAC, Temp Sensors, Oxy Sensor and other things. I do have a VX camshaft that I put in 20 years ago. My car idles a little rough but it will run pretty good and then it will just bog down when accelerating. When it is cold outside (below 55) it barely runs until it warms up. I do have a cold start injector that I confirmed works. I can live with the rough idle but the bogging down is driving me crazy. It will then catch up and take off.
At this point the only thing to replace is the ECU. Any ideas or does anyone have one they would sell? I appreciate any help.
I have tried everything- does anyone have an ECU they would sell? 1990 240DL
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volvolugnut
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Are you certain you do not have vacuum leak? Perhaps at the intake manifold gasket?
volvolugnut
volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
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Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
John Deere 214 lawn tractor about 1977 model
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
John Deere 214 lawn tractor about 1977 model
And others.
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rice240
- Posts: 16
- Joined: 27 Mar 2014, 11:17
- Year and Model: 90 240 and 94 850T
- Location: Houston, Texas
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Well, I just had the manifold off and actually cleaned and polished it. I replaced several of the hoses like the ones to the IAC. I installed new gaskets. The vacuum did go up a little to about 16 at idle. (I have a gauge in the dash.) I put silicone grease around the new injectors. My flex hose is good. I put a new hose to brake booster. PCV was cleaned and hoses seemed tight.
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