zeake

iTrader: (5)

Truck runs fine. CEL shows random misfire. With a snap-on solus scanner the o2s look to be working fine. The only strange thing I see is in the pic below 99kpa It never moves from there either. I have swapped coils and wires and plugs at 2 and 4. because 2 was showing the misfire. The misfire moved over to cyl #1 and it just floats around. What say you guys on the subject? Map sensor? Sorry I did not get a better pic.

zeake

iTrader: (5)

Anyone?

2000chevysilverado

iTrader: (11)

How about fuel issue I ran into same problem year ago ended up being dirty fuel filter

zeake

iTrader: (5)

It had new fuel pump assembly a couple of months ago.

zeake

iTrader: (5)

Come on guys any more suggestions? Should I go ahead and waste 50$ on a map sensor?

2000chevysilverado

iTrader: (11)

Did ya check fuel pressure as well maybe dirty injectors

zeake

iTrader: (5)

There's an idea. I didn't check the pressure. I did buy some fuel system cleaner.
I will check the pressure tomorrow. Thanks for the idea.

2000chevysilverado

iTrader: (11)

No problem new still doenst mean went bad

zeake

iTrader: (5)

True. I sold my 89 gta ta after it was over heating. I had replaced rad water pump hoses thermostat 6 months before. I told the guy that bought it it was running hot. That afternoon he rubbed it in that it was the pump.

2000chevysilverado

iTrader: (11)

I did same thing to a guy he told me wasn't getn fuel and he put new pump and filter on, paid cash put fuse in drove it home