Join Date: Aug 2011
Location: Bay Area, CA
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Engine running weird / strange
I have a 1997 PSD with the ZF-5, 22x,xxx miles, ts-5 position chip, 6637 intake, diamond eye exhaust 4", new cps, 3x gauges boost, pyro, hpop.
I have owned the truck now for about a year, and I have noticed this "problem" has been occurring on and off.
When I start my truck, it will run like one of two scenarios.
First, I will have my chip set to 45+hp economy mode, more power than stock. A little boggey if I give it too much gas at around 1500rpm, Not as much power as I would expect.
Second, No matter if I have my chip set to 45+ or 140+ (I have stock injectors), the truck will run like a beast. Full power, not boggey at all, no smoke, running like it was brand spanking new breathing fire.
Here is what's weird. Sometimes it will be running like the second case, sometimes the first. Its never consistent. But, when it is not running like case two, the HPOP jumps a little bit up and down when at idle. Just a hair really. You can hear the engine rev up a hundred RPM or so at max. Almost unnoticeable.
Does anyone think this is an HPOP problem, sensor problem, something else I'm not thinking of? I've done some searching but so solid answers. I thought it would be my CPS, but I've replaced that recently.