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Old 06-08-2018, 03:26 PM   #21
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Just as a sanity check - have you looked at the ignition timing? And, are the fusible links in good shape?

In the 1989 FSM, Fail-safe (limp mode) is discussed around EF & EC-40.

I highlighted the area below because you mentioned Code 51 for Injector earlier.

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Old 06-08-2018, 04:36 PM   #22
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Yes, I've made sure TDC is on #1. The timing chain is about 4 years old and looks good through the oil filler cap. I do get zapped messing with the distributor when running. I have good, newish, AC Delco wires (I've installed inferior ones in the past) but I shouldn't be getting zapped. So I have another cap and Nissan wires I'll install and check.

As for the injectors- I have two TBIs- My original and another from a good running truck- both of them exhibit the same symptoms, so I'm thinking all those injectors can't be bad... It would be bad luck if they were.

Also- update- Just drove it, and if I throttle it (in neutral), it'll "POP! POP! POP!" on acceleration, but it will then smooth out on high rpms. Like it 'cleans out'. Letting back off the gas, it'll do the same thing if I throttle it again.

Code 51 seems to be for the VG30i... So I've been disregarding it. The last time I checked codes it read 55.
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Old 06-08-2018, 08:39 PM   #23
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SOLVED.
It turned out to be (yes) the Distributor cap and or wires. I replaced them and the truck is running better than ever before. Thank you to all who joined in, you guys rule.
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Old 06-09-2018, 09:19 AM   #24
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Quote:
Originally Posted by bwilson27 View Post
SOLVED.
It turned out to be (yes) the Distributor cap and or wires. I replaced them and the truck is running better than ever before. Thank you to all who joined in, you guys rule.
Yes, we do. But some rule more than others. That means some here are BETTER at diagnosing than others is all. But everyone tries to help.

When you adjust your distributor around, you should wear heavy gloves so you don't get zapped. Even the best distributors can make you bang your head on your hood sometimes when you get shocked. Been there, done that. (ouch)
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Old 06-09-2018, 12:56 PM   #25
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You should never be shocked by any part of your ignition. If you are you have a failure in the insulation somewhere. Its high voltage at low current and can jump short distances through air.
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Old 06-09-2018, 10:06 PM   #26
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Quote:
Originally Posted by Deerhurst View Post
You should never be shocked by any part of your ignition. If you are you have a failure in the insulation somewhere. Its high voltage at low current and can jump short distances through air.
yea the only time im conscious of being zapped is messing around the alternator.
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Old 06-09-2018, 10:31 PM   #27
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Quote:
Originally Posted by h.stickeye View Post
yea the only time im conscious of being zapped is messing around the alternator.
I recall touching the ignition coil on my old car a few times while it was running. That'll wake you up. Starters too, if you forget to disconnect the battery first.
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Old 06-09-2018, 10:38 PM   #28
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I've been zapped by an alternator and lit the starter on fire before. Both cases I was being dumb and the battery was still connected. As far as ignitions system I can run my hands on every part of mine and never get zapped.
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Old 06-09-2018, 10:44 PM   #29
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To be fair the wire running from the coil to the distributor was very old and dry rotted, I'm sure the insulation wasn't 100% or anywhere close to it. I think I was messing with something else right next to it when it got me.
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Old 06-10-2018, 01:10 AM   #30
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That'll do it!
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