I have a 1998 1500 Silverado that sat up for over a year because the prior owner's father ran the truck in the middle of an oil change without verifying that the oil was added during an oil change. I changed the motor, fuel sending unit, fuel pump and screen, ignition system components. The engine
would run fine sometimes at an idle, sometimes it would start rough, and sometimes the engine would run smooth to idle or idle to rough. When driving, the engine would run rough, backfire, launch, and then it would run smooth. I had a scan done at Auto Zone and their computer stated that the cam position sensor, MAP sensor and the knock sensor
were bad. A map sensor was used from another engine. Upon inspection of the distributor, it was discovered that the gear was bad. I replaced the distributor and now the truck runs fine at an idle, but now the truck will not accelerate at an idle or under a load.
JA: How many miles are on the car? Have you checked the spark plugs
Customer: I don't know how many miles are on the replacement engine. Possibly 150-200,000 miles. I took it out of a truck that I wrecked. I have new plugs, wires, pick up coil.
JA: What is the model of your '98 Chevy?
Customer: It is a 2wd Silverado with a 5.7 litre engine.
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I have a mechanic working on it now and he is baffled. I have only tried the above mentioned steps.
JA: Anything else you think the mechanic should know?
Customer: I think the mechanic should know of any possible solutions to the problem.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Chevy Mechanic about your situation and then connect you two.