Kinda guessing that .zip files will not be well-received, as they're associated with viruses.
If you could post your data in some other format, it would be better.
If you could post your data in some other format, it would be better.
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Anything you recommend?Kinda guessing that .zip files will not be well-received, as they're associated with viruses.
If you could post your data in some other format, it would be better.
They're accepted on this and other forums I subscribe to. I downloaded and played it with no issues.Kinda guessing that .zip files will not be well-received, as they're associated with viruses.
TL;DRAnything you recommend?
The issue is that the RPM's surge when I hold the throttle as I posted a video of a couple posts ago. Also the truck has no power and struggles to get up to normal driving speed.TL;DR
What is your issue?
Did this log contain your issue?
I'm at my wits end with this truck. I've looked over and over the sensor data and everything seems fine. I rechecked all the stuff that I've checked already and again it all looks fine. I have no idea where to go anymore.
Is it possible that this is an ECM issue? Somebody had hacked the wiring pretty bad to install an aftermarket anti theft system which I removed when I got the truck. Is it possible that system fried the ECM?
(Here's the LINK to that thread.)I did exactly what you are talking about in my truck...89 RCSB K1500. I rebuilt a 350 TPI with iron heads from a 89 Camaro. I also did the ultimate tbi mods, turned up the fuel pressure to 15 psi and used a tbi intake without all the smog stuff. My truck runs great but it didn't right after the swap. It fired up no problem but ran terribly on the stock chip. I'm tuning it now with the ebl flash. I'm happy with it.
I'm honestly thinking of selling the truck because this is taking way more time and money than I wanted to put into it.
Yeah that makes sense. I had no idea that the TPI cam was more aggressive and that the TBI wouldn't be able to compensate for it. That explains the low vacuum.Since the PO took it upon himself to change out the original TBI motor for a TPI
short block, and then installed the TBI setup on top of it, we have to keep this in the back of our mind. (ie: How does
the TPI cam play with the TBI system, especially when it goes closed-loop? (Engine Bay Context)
You need to try to tune the TBI software to be more compatible with
what the TPI engine (camshaft) needs in order to get the most you can out of
the unique combo under your hood.
One of the main reasons I got this truck was to learn how to work on TBI and OBD1 but I definitely didn't think I was jumping this far into the deep end. So its not that I don't want to see this truck through its just that I was hoping to be able to drive it sooner. I have 0 experience doing any tuning on fuel injected stuff so I have no idea where to start on this. However I'm totally willing to give it a shot. Any suggestions?FWIW, if you are willing to follow the lead of n9nefingers I think you can finish
the repair of this truck that was started by the PO. And as you know, a good
running truck will sell for more money than one that doesn't run right.
So the decision becomes do you want to learn/add the necessary skills to your
repertoire, fix it, then decide to keep it/sell it? Or is that a non-goal of yours,
and just want to cut your losses? I can completely understand either choice,
so I'm not trying to steer you in any one direction. I'm just trying to suss the
puzzle in your engine bay, and try to come up with a permanent fix using the
least number of parts/repair attempts.
Compression is fine.Did a compression test today
thats my best guess as to why the couple lean plugs.
The problem is not the "lean" plugs, the problem is the black (oil-fouled?) plugs.You must be registered for see images attach
Thats an aftermarket distributor. Which does not have to be a bad thing, considering you replaced all the problematic parts... All but one...Tested the fuel pressure, 12 PSI solid no matter what (as it should be with a brand new pump)
Checked the distributor and the magnet does look a little worse for wear. However the ohms on the pickup coil are okay ~1300
I double checked a few other sensors and everything seems fine.
I also took some videos of my truck running so maybe that will give you guys a better understanding of what's going on
Engine Bay and Interior (Yes the oil and temp gauges aren't working. got bigger fish to fry)
Darn electronics, Any input on a carb swap? lol
Definitely not oil, just fouled from a rich mixture. Could that be because of the misfiring cylinder causing the computer to add more fuel? Or would that be the opposite?The problem is not the "lean" plugs, the problem is the black (oil-fouled?) plugs.
I replaced the ICM. I don't think it's the distributor because when I unplugged the electronic timing advance and set base timing at around 15⁰ the truck ran much better, and vacuum was much higher. To me this really feels like a camshaft issue. Seems like the computer is feeding both the ignition system and fuel system bad information.When I bought mine I did some digging in the Amazon Reviews and the ICM and Pickup coil seem to be failiing/faulty at somewhat high rates.