85 with TBI only needs 13lbs of fuel pressure. verify that the fuel filter is clean. there is no easy way to ck fuel pressure, special adapters are needed, I dont have info here at home but there should be a relay for the pump, on the firewall and the oil pressure switch also powers the pump. did you replace the pump trying to fix this problem or did you just mention it to help troubleshoot the problem? verify that the fuel pump wiring has a good ground, should have been a eyelet that bolted to the frame..when you initially turn the key on, you should hera the fuel pump power up for 2 seconds, then go off, after the engine starts, the power for the pump goes through the oil pressure switch.
SOURCE: 1992 Silverado backfiring through the throttle body
you could put the pickup on a cylinder pressure test and see if you have a bad valve causing the engine to pop.
you could have a bad wire or spark plug.
the timming chain could of went off a cog on the timming sprokets causing to pop.
gettin to much gas could cause it to.
SOURCE: Timing problem with 1985 Ford Ranger
more than likely it is a timing problem,or the valves are not seating right,diesel in petrol ??air leak on inlet manifold without having the motor in front of me its difficult to diagnose.This is an older vehicle of potential classic possibilities.Therefore because its so valuable i would suggest you call a local mobile mechanic.One with a few years under his belt who has worked on these vehicles when they were new,and if he doesnt do it right kick his zimmer frame away
SOURCE: Sputtering backfiring, stalling randomly when i engage the clutch. help!
everytime i try to start my truck, it turns over then stalls out on me. any idea?
SOURCE: 1999 lumina 3100 spits sputters and backfires out throttle body
You need to get the codes read to verify,but i think your in need of coil pack or wires.
1,047 views
Usually answered in minutes!
It is a mechanical fuel pump that bolts to the motor
It is a mechanical fuel pump that bolts to the motor
I am getting plenty of fuel and here is what is going on. I got the truck to fire and it was sounding great, I went to take it for a test drive and when I put it into gear it died on me and would not fire back up. I checked and I'm getting NO spark at all. I am lost as to what could be causeing this. All the wires are connected good. What can be causeing this or what and how do i check this? please help
×