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Well when it broke down the first time it defaulted. It acts the exact same way now. Its reading 2500 while cranking, which is obviously wrong. I'll have to try the voltage thing.

So could it still be a harness?

So would that be a bad hpop? Or bad harness? No mods. 193,000 miles. No recent work performed on it either.

We checked fuses, they're all good. Changed CPS, haven't checked injector harness yet, I found an entire engine harness for around 50 bucks that I can pick up and try.

So, truck broke down a few weeks ago and it ended up being a bad IPR plug. Replaced it, ran great, few nights ago did the same thing. Changed the plug, IPR valve, ICP, and still won't start. Hooked it up to scan tool and the ICP read 2700 which is more then enough to start. Super abnormal. Any...

Well it's at 193,000 and it's a late 99. I might have to check the uvch

Checked fuses. WTS light coming on like normal. Charged both batteries. It tried starting a little better with ICP unplugged but still wouldn't start. That's why we're wondering if its a harness.

The last time we checked it it read default. It did the same thing then as its doing now. It was just a plug the first time so do you think it could be a harness or something?

Haven't tried the buzz test. Its blowing white smoke while cranking.

We checked oil and then changed the cps and no luck

So, truck broke down 3 weeks ago, it started sputtering and then died. Changed IPR plug and it fixed it. A couple nights ago it did the same thing, changed the plug, CPS, IPR valve and it still won't start. Any ideas?