Hello,
I could really use some help. I have a 88 744 turbo with 241,000 miles on it. Here is the scenario. I parked the car in the garage and I didn't drive it for the next three days. I came out to go to work and lo and behold I have a three-cyclinder volvo! The car was operating with a miss. OK, so I checked and cleaned the plugs (they were fine) and then I checked the cap and rotor. Well the rotor nearly broke off when I took the cap off so I said AH HA! I found the culprit. I replaced the cap and rotor and still nothing in #4. Then I checked the plug wires and they checked out ok. Ok. so maybe its the injector I thoughtso I replace the injector with a good extra one I had. Still nothin in number four. So, my last test will be a compression check and it seems the outcome may be pretty grim. The only other wildcard in my setup is that the fuel pump is ready to be replaced as it is whining loudly. My question then is, has this sudden (and hypothetical) loss of compression happened to anyone else or could the fuel pump be so weak that there is not enough fuel getting to the last injector on the rail? When I pull the injector plug off #4 the car does not run any differently. I need to use my car directly so any suggestions would be appreciated.

J. Studer