83 944 fuel delivery issue
07-15-2021, 10:59 PM
#1
AutoX
Thread Starter
83 944 fuel delivery issue
Hi, new to Porsche and this forum but I recently bought a 83 944 and it turns over but doesn’t start I’ve hooked 12 volts directly to the fuel pump and it works so I replaced the dme relay and still nothing.
07-20-2021, 11:28 AM
#2
Rennlist Member
Does the tach needle wiggle while cranking? Could be the reference sensors. WELCOME TO THE FORUM! Does it have fresh fuel? There is a hex cap at the end of the fuel injector rail. Remove the cap, and don't lose the ball bearing inside, turn on the pump and make sure that you are getting fuel through the rail. Disconnect the coil wire first at the coil. Apparently the car has been sitting ..How long? Look at the thread above concerning the new poster and his dad's 83 model. After playing with the fuel rail and determining fuel flow, next check for spark. Pull a plug, is it wet? Does it smell like fuel? If so, reconnect the wire to it, and lay it on the block ( away from any spilled fuel) and have someone crank the car, while you look for spark. If you have spark at the plug, that's a good sign. Especially if it's wet and smells like fuel. If you still have spark, and it's dry then you may have an injector problem. Keep us posted on your progress!!
07-20-2021, 08:45 PM
#3
AutoX
Thread Starter
Does the tach needle wiggle while cranking? Could be the reference sensors. WELCOME TO THE FORUM! Does it have fresh fuel? There is a hex cap at the end of the fuel injector rail. Remove the cap, and don't lose the ball bearing inside, turn on the pump and make sure that you are getting fuel through the rail. Disconnect the coil wire first at the coil. Apparently the car has been sitting ..How long? Look at the thread above concerning the new poster and his dad's 83 model. After playing with the fuel rail and determining fuel flow, next check for spark. Pull a plug, is it wet? Does it smell like fuel? If so, reconnect the wire to it, and lay it on the block ( away from any spilled fuel) and have someone crank the car, while you look for spark. If you have spark at the plug, that's a good sign. Especially if it's wet and smells like fuel. If you still have spark, and it's dry then you may have an injector problem. Keep us posted on your progress!!
07-25-2021, 11:39 PM
#5
Rennlist Member
Reach out to Kevin Gross (PM) about the reverse issue. He's the "Go to GUY" here on transmission issues. It could be just crappy rubber bushings in the shift linkage. Or, perhaps a clutch adjustment..