The 1971 P1800E that I've been driving lately has an IPD replacement FI computer. Which is nice due to the adjustable fuel mixture settings. I was reading up on the Bosch D-Jet FI system in a 1998 article in "Rolling." It mentioned that in 1972, volvo realized that by changing the injector firing sequence, they could both increase fuel economy and reduce emmissions. According to this article, this in the only somewhat minor difference between the early and later D-jet cars.

Sooo... I ran across a working ECU pulled from a 1972 140 series d-jet and picked it up rather cheap. The 72's ECU is a Bosch #0 280 000 034.

Would installing this replacement ECU work in my '71, converting it to the improved firing sequence (with fewer emissions and better fuel economy)? However, if it's really that simple a change, wouldn't this feature already be incorporated in the IPD injection computer??

and... because the IPD computer is an aftermarket setup, it does not operate the cold-start feature properly. This requires that I manually enrich the mixture to get the car started on cold days. Would using the '72 ECU correct and improve the situation?

Thanks





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1967 P220 Amazon, 1972 145S, 1976 245 DL, 1983 245 DL, 1986 745 GLE, 1990 745 GL, 1995 945....
You mean to tell me that Volvo makes cars that are *NOT* Wagons?!?
1971 P1800E... Not a wagon, but it's just a donor car for the Amazon..