1
1jeff1
Guest
"1985 GM 350 5.7 litre and for
"1985 GM 350 5.7 litre and for some reason they are calling it a 260?
It appears through the manual I have the thunderbolt 4 ignition system.
It idles OK, starts OK but under a load I have significant power loss. In full throttle there is backfiring through the motor, not alot, just a pop or 2. The first time out it ran fine but towards the end of the day I though I noticed a bit of power loss but there was no backfireing. Second time out there was power loss from the start and when I tried to nail it there was the popping so I just backed off. Also there seemed to be possible surging, not noticable in the speed but to the ear.
I changed the fuel seperator before going out the second time and there was a bit of water inside but the filter at the carb was clear and clean.
The sensor wheel appears to show no wear but the sensor itself seemed to have a bit of a rusty color at the pickup point but I have no idea what to look for.
Any possible help will be greatly appriciated.
Jeff"
"1985 GM 350 5.7 litre and for some reason they are calling it a 260?
It appears through the manual I have the thunderbolt 4 ignition system.
It idles OK, starts OK but under a load I have significant power loss. In full throttle there is backfiring through the motor, not alot, just a pop or 2. The first time out it ran fine but towards the end of the day I though I noticed a bit of power loss but there was no backfireing. Second time out there was power loss from the start and when I tried to nail it there was the popping so I just backed off. Also there seemed to be possible surging, not noticable in the speed but to the ear.
I changed the fuel seperator before going out the second time and there was a bit of water inside but the filter at the carb was clear and clean.
The sensor wheel appears to show no wear but the sensor itself seemed to have a bit of a rusty color at the pickup point but I have no idea what to look for.
Any possible help will be greatly appriciated.
Jeff"