242Bleek
k-jet groupie
- Joined
- Jul 18, 2005
- Location
- Brooksville/Tampa, FL
Hello, trying to get my 84 240 with LH 2.0 up and running. Car was running previously but running poorly then finally died. Ive gone through everything on this car. Changed both fuel pumps, filter, checked all electrical connections at fuse panel etc. This car has a new oem wiring harness from volvo. I checked for spark and thats all good and well. I replaced injectors too. I go to check voltage at the fuel injectors and when I ground the test light to the body I see 12v when cranking from the power side of the injector plug. However when I ground the test light to the other side of the injector plug (ECM side) and crank it, I get a very dim, almost non existent light on test light. This indicates to me that the ECM is not grounding the injectors or doing a poor job of it.
I have checked every single pin on the ECM plug to verify continuity with a multimeter at every terminal including #13 which pulses the injectors, theres no signs of any crossing of wires in the harness, all grounds including the ones on the intake have been cleaned and greased. I have verfied that both the system relay and FP relay are working properly and all pins at both relays are giving/receiving all the correct inputs. I am now on my second ECM too with no changes, its a 510 ECM.
There is absolutely no reason the injectors shouldnt be getting ground as the ECM has been confirmed to be grounded properly. Theres literally nothing else to check, I have been working on these cars my entire life and have never seen this happen, I know 240's like the back of my hand. Im writing this as a last ditch effort and am hoping to get some different input on anything else I could check. Thanks
I have checked every single pin on the ECM plug to verify continuity with a multimeter at every terminal including #13 which pulses the injectors, theres no signs of any crossing of wires in the harness, all grounds including the ones on the intake have been cleaned and greased. I have verfied that both the system relay and FP relay are working properly and all pins at both relays are giving/receiving all the correct inputs. I am now on my second ECM too with no changes, its a 510 ECM.
There is absolutely no reason the injectors shouldnt be getting ground as the ECM has been confirmed to be grounded properly. Theres literally nothing else to check, I have been working on these cars my entire life and have never seen this happen, I know 240's like the back of my hand. Im writing this as a last ditch effort and am hoping to get some different input on anything else I could check. Thanks