My best friend gave me an '83 wagon as a wedding gift, but somehow it got a hole in the oil pan and seized up. He lined up an engine to swap, but it is from an '86. I realize now that the '83 had a B23, while the '86 has the B230. After installing the engine and swapping out the ECU and the computer under the glove box, there is no spark-no power to the coil. Are there some inherent issues with making this swap? There must be some way to work around this, PLEASE HELP!!!

 

you're using the 83 or 86 engine wiring harness? 83 or 86 ignition system? 83 or 86 injectors?

I would have swapped everything from the older engine onto the newer one, so you're just using the newer block but still using the original injection, ignition, etc.

 

We swapped the engines with the wiring harness and injectors attached to the block(so using the '86), and swapped out the ECU and the computer. Didn't change anything else as far as ignition

 

power to the coil pin 15 should come right off the ignition key

 

Do you know if the replacement engine ran. If you hot wire the coil will it run.

 

oh... this IS a volvo 240, right? 740's were available overseas in 83 although they didn't import to the US til 84.

and, this is a US model ? overseas 240's had different sorts of ignition and injection over the years.

all the rest of this assumes a US model 240....

unluckily, the OTP Volvo 240 CD I have is missing the 1983 wiring diagrams. in 1984, they used the "MPG" ignition system with an ICU (ignition control unit) on the inside right fender, just behind the headlight. 86 used a similar-but-different CHrysler ignition system also on that same fender. major difference, 86 has a connection to the ECU (fuel injection), 84 got the timing off the coil pin 1. both 84 and 86, the coil and ICU get their power directly off the fuse block where it comes off the ignition switch. there should be two blue wires at coil pin 15, one from the fuse block (but not fused) and one to the ICU pin 2.

when you turn on the ignition key to 'run', you should have power on fuses 11,12,13.


At the fuse block, to the right of each fuse there are three spade lugs. The rightmost (farthest from the fuse) spade is connected to the left side of the fuse and is the power input, the other two lugs (middle and left) are connected to the right side of the fuse and are the fuse 'outputs'.

On the fuse 12 input there should be a blue-yellow wire that comes directly from ignition switch pin 15 (hot in run or start). on fuse 11 input, there should be the blue wire that goes to the coil pin 1. inside the fuse block, the inputs of fuse 11-12-13 are bussed together.

 

Thank you very much Pierce! Got it started last night!!!

 

what was it?