Off course code 327

Anyway, bought a mechanically neglected 95 F350 with a 460. Engine was running fine with big exhaust, rear/front main leaks. Took the engine out to install new seals. Noticed bearings all copper color. Installed new bearings, new crank and seals, new oil pump. Cam didn't look too good but I was out of money/time.

After fighting a short to the tach of the coil giving no spark, I got her to run ... like crap. Rough/stalls.

New (not reman) dizzy, new wires, new plugs, new coil, new IAC, new oil pressure sensor. OBD KOEO calls for a 327 still.

Vac is low at 13-14 (keep in mind I live at 4,000ft elevation) with a 1" flicker.
Idles @ 500 RPM, timing Spout off is 12, Spout on 34-ish.
Fuel pressure key on is super low @ 20, takes a couple of tries to get it started then stays @ 35. When engine off, pressure bleeds quickly, time for new fuel pumps soon.

I hope my old timing chain did not jump

Here's the vid (sorry super low quality).

What's your guys take before I tow it to a dealer or start tearing into the top end?

 

Do you have the vac line connected to the map sensor? probably but can tell in the video.

Hard to say for sure but looks like all cylinders are not participating equally and more than one of them not at all.

Does it have an exhaust system bolted to it?

Go over your firing order make sure its correct, make sure when removing a wire it makes a difference in how it runs for all cylinders. Might not be spark may be a fuel supply issue, injector or injectors not opening for example but even if not removing the spark plug wire will have no effect even if plug is actively sparking.

Engine idle speed too low but why, only running on 6 cylinders? if create a small vac leak does idle speed come up? if unplug IAC does engine die or run at or try to at least at a reduced speed, that IAC valve doing anything?

Fuel pressure bleeds off rapidly, find out why.

Returning via supply line to fuel tank not selected at the time? Have you tried switching tanks, if known to work has fuel in it make any difference?

Faulty fpr? Pinch off return line at fuel rail, does pressure fuel improve? any signs of fuel leak from FPR vac port?

Injector issue?

You state it ran good before you pulled it, sure sign its something you did or didn't do putting it back in rather than say injector or fpr. Fuel pump yea from before took it apart and now yea anythings possible sure.

Looks like getting it running stronger hitting on all eight (if its not) and correcting fp issues idle speed and engine vac readings will improve with it.

 

Thank you Danr1, I'll press on the fuel related tests when it's not dark out.

MAP is plugged to the back of the manifold. My firing order is 15426378 which is the right one. When I unplug the IAC the engine dies. Unplugging the wires 1 5 4 and 8 are dead (no diiference). They all do have a spark.

Something I just noticed : when I fire the engine up cold it rans fine with a slight shake at 800 rpm for 3-4 seconds then it abruptly drops to 500 and what you see in the video.

Maybe take the injectors off tomorrow? When I installed the new crank the engine was flipped upside down and some left over thick dirty oil dripped from the throttle body and the exhaust ports. Maybe it clogged some of the injectors?

 

Check firing order again...

 

Krooser, thank you. I did it again 3 times and it's right. Looking at the engine from front cyl 1-4 left, 5-8 right. 1 and 5 being toward front bumper.

Thinking about it, I need to take a compression test. When I installed the rod bearings and rotated the crank around maybe genius me bent the dam valves on those dead cylinders? (are Ford 460s non destructives?).

I'll do a compression check tomorrow on those dead cylinders.

 

Those cylinders are a batch fired together, check the circuit for problems.

Injectors are fired in two batchs,

1-4-5-8 are all fired at the same time via tan wire

2-3-6-7 are all fired at the same time via white wire

Red wire supplies key on power to them, computer then provides path to ground via tan and white wires when time to fire them.

Find out why that one batch isn't firing and you'll have won most the battle.

 

Open tan wire from injectors to computer or bad computer.
Unplug the computer and check for pushed out pin in the computer plug and check continuity from pin #58 of the computer plug to one of the injectors (1,4,5 or 8) tan wire on the non firing bank.

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Danr1 & Subford you guys nailed it (see video). The connector was not screewed/pushed all the way in. Then ran like before with a very slight shake. KOEO test came back 111. I hope it will help someone else, I renamed the title to (cylinder 5 4 8 1 not contributing). On to the fuel pressure!


Thank you