Misfire, hard start, rough idle??
#1
Misfire, hard start, rough idle??
I have a 97 K1500 with the 5.7. I just did the upper and lower intake manifold and replaced the fuel pressure regulator while I was at it. It now has a rough idle, misses and hesitates and is hard to get started. It will crank crank crank crank and the start up like its rebuilding fuel pressure.
The last time I checked the pressure was before the intake job and it was at 61 psi, but sometimes would shoot up to 61 then come right back down randomnly. Today I checked the plugs and found that the driver side was completely fouled out, but the passenger side where fine. Anyone have any ideas?
The last time I checked the pressure was before the intake job and it was at 61 psi, but sometimes would shoot up to 61 then come right back down randomnly. Today I checked the plugs and found that the driver side was completely fouled out, but the passenger side where fine. Anyone have any ideas?
#2
Super Moderator
Professional Mechanic
Professional Mechanic
You need to pull the upper intake off. The spider unit must be leaking from a injector or the regulator. Its possible some injectors are not back in correctly.
#7
Well I replaced the fuel pump on it. After checking the pressure again. It would drop more than 10psi in 3 minutes after being turned off.. Fires right up now. Now I have a bigger problem I think. I can hear a gurgling noise coming from the heater core area, the truck overheats and the coolant is being pushed into the overflow bottle with air taking its place.....head gasket?
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