72 FJ40 F-engine issue (1 Viewer)

Joined
Mar 3, 2011
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Salinas, CA
I recently aquired a 1972 FJ40 with the original F engine and took it out for an extended test drive yesterday. Unfortunately I had to be towed home.... I was driving along at around 60 mph when the engine just shut down. I am able to start it but as soon as the starter is off it dies again. I don't know alot about the history of the vehicle but it does have electronic ignition and a weber 36 dgec carburetor. I checked the fuel pump and lines/filter and all are clear. Anyone have any ideas?
 

JohnnyC

Long ago TLCA# 2231
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UpState Ny, Wells Me
 
 
 
check for spark?

is the carb getting gas? when you move the throttle does gas come out?

check grounds?
 
Joined
Mar 3, 2011
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Salinas, CA
Carb is getting gas. Spark & ignition coil are good. Didn't check grounds. It's a wiring nightmare in the engine compartment and under the dash. Any hints on which to check first?
 
Joined
Feb 27, 2011
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Casper Wy
Check to see if you have power to the coil with the key on. Depending on how it is wired you may have ignition while cranking and lose it when you release the key. Had an old Dodge that did that intermittently-- very frustrating :mad: and hard to get running!
 
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Mar 3, 2011
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Salinas, CA
Interesting. I'll check that tomorrow. Thanks for the tip. Hard to imagine that happening when driving. I suspect that would then point to the actual ignition switch? Or is there some other relay somewhere?
 
Joined
Nov 30, 2010
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Good ole' USA
I ran into a starter problem once. The key would not activate the starter. Had power at the fuse box and at the switch. It ended up being a bad wire in the harness itself (about 6 inches from the fuse block connector)under about 10 wraps of original harness tape. Hard problem to find. Voltage was there, but the original factory splice couldn't handle the amperage. I suggest you run a jumper wire to the distributor to insure proper voltage, then crank over.
 

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