Question about Cars & Trucks
1988 ford f350 460, fuel injected. was running great then suddenly as I left a stop light it was missing. But has the rpm's went above 1200 it leveled out and ran smooth, no miss. Over the next mile with 3 more stop and goes it got worse until it finally died. Towed it 3 miles home, it fired up and ran great for a 10 seconds then started missing until rmps was above 1200 again and like before it got worse and worse until it died and wouldnt start. (((( As strange as it sound I discover it only gets spark to the #4 plug. I changed the ignition mod, plugs, plug wires, dist. cap, rotor and coil.)))). I have also noted that the tach is jumping while the engine is cranked (which has never happend before),, and it was jumping (badly) while the engine was missing before it would die.. Any thoughts?? Thanks in advance
UN-fortunately 1988 is WELL before the OBD
(on board diagnostic)... DIAGNOSTIC TROUBLE
Codes (DTC) got standardized...
So DAYS can be wasted looking for commonality...
Rather than assuming your spark, timing, fuel, ECU...
Oxygen Sensors. INJECTORS are all askew...
I would suggest that if you SATURATED YOUR
HEADER BOLTS with LIQUID WRENCH...
and opened you EXHAUST ahead of your catalytic
converters... ahead of your mufflers... you engine would run...
Obviously DANGEROUS to operate in that condition... at
least you would know what had to be REPLACED before
you can operate your vehicle SAFELY.
If you decide the job is a bit too much... at least
check out your PURCHASE cost of a replacement
CAT and/or MUFFLER...
1988 FORD 350 7 5L 460cid V8 Catalytic Converter RockAuto
1988 FORD 350 7 5L 460cid V8 Muffler RockAuto
Posted on Mar 16, 2017
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Posted on Jan 02, 2017
SOURCE: ENGINE WONT TURN OVER
sounds like the timing belt it has a interference engine so if the timing belt broke you could have bent rods and cracked pistons or worse. good luck
Posted on Dec 15, 2008
There may be no injector pulse if the computor does not see a RPM signal.
There will be no spark if the ignition module does not see a dist pulse from the dist pickup.......a RPM signal.
Because you do not have both ......I would suggest to check/change the dist pick up.
Follow the wires from the ignition module inside the dist to the pickup which is also inside the dist.
If it is just a bad dist pickup....keep all your old parts as good spares.
Also...is the dist turning? to provide a RPM signal?
You will have to remove the dist to change the pick-up.....mark your timing locations......"rotor position" and "dist body location"before removal.
A quick test before installing the "repaired dist" .....plug it in the the truck wiring and turn on the key....DO NOT CRANK THE ENGINE OR YOU WILL LOSE YOUR DIST ROTOR CORRECT POSITION......as you spin the dist by hand .....the injectors should spray.
Posted on Aug 23, 2009
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Check to see if the spark plugs are getting voltage. Check your distributor and rotor and make sure the distributor cap is not cracked, and the rotor is making contact. You can use an inductive timing light or use a spark plug connected to one of the plug wires to and ground the base of the plug using a jumper cable (do not touch the plug when cranking). When cranking you should see a spark. If you do not it could be the coil or electronic ignition. If you see sparks then you need to check the fuel pump pressure.
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