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Re: 95 1500 hard starting
Quote:
Originally Posted by imakedacookies
I have a 95 1500 with the 350 and 5 speed manual that ... ...is a nightmare to start. Since the hard starting occurred I put a new map sensor on it. I'm going to do a coolant temp sensor, fuel pressure regulator, spark plugs and wires this weekend. It could use all the above but I'm not sure if that will fix the issue. Fuel pressure up to the tbi is good and it seems to me like a fuel pressure issue on startup, but I could be way over thinking. Any ideas?
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1. Does a scan tool show that these sensors are defective? Does a scan tool prove the other sensors and computer outputs are OK?
2. What is the fuel pressure? Why does it "need" a pressure regulator?
3. Does the fuel pump prime when the key is turned from "Off" to "Run"? What is the fuel pressure during prime?
If the fuel pump doesn't prime, you've got trouble somewhere in the fuel pump relay circuit. This might or might not be the relay itself. Could be in the ECM, or it could be in the relay wire harness somewhere. If the pump won't prime, you need to crank the engine long enough to build oil pressure so that the fuel pump runs off of the oil pressure switch instead of the relay.
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