7.3 cutting out around 2000 rpm - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 3 (permalink) Old 10-12-2012, 01:49 PM Thread Starter
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7.3 cutting out around 2000 rpm

I have a 95 PSD, it has 3 1/2" DP 4" straight pipe with 6" tip, tymar intake and TS chip. A week ago I filled up the tank, left the gas station and my truck shut off. I turned it over for a while and it wouldn't start. The next day I towed it home and let it sit a few days. I found the ipr unplugged so I plugged it in and let the batteries charge overnight. I got it running yesterday and when it first started it was breathing really heavy thru the intake and wasn't idling normal. I shut it off and started back up and it was idling like it should but when I rev it up slow it cuts out around 2000 rpm. Every now and then it makes a popping sound, kinda like a backfire but it's not loud, maybe an injector popping loud? Any ideas on what could cause this? I had a fuel pressure sensor where the schrader valve goes and when it first shut off I took it out and put the schrader valve back in to make sure it was getting fuel, I don't know if it's leaking because it was dark when I got it running. If its leaking fuel, could that cause this?
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post #2 of 3 (permalink) Old 10-13-2012, 05:27 AM
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Re: 7.3 cutting out around 2000 rpm

Definitely check your fuel pressure first. The next thing to do is to get it on a scanner so you can see live data and so that you can buzz test the injectors as well as a contribution test.

97 F-350 XLT CC DRW 4X4 PSD, 285/75-16 Custom bumpers, Gauges-boost/egt/trans, Swamps IDM, 3.5"dp- 4" exh., 3" Body lift, ES bushings/mounts, Built trans, billet conv, B&M pan, Hayden cooler, Adrenaline, stage 2's, IC, H2E, E-fuel
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post #3 of 3 (permalink) Old 10-13-2012, 05:11 PM Thread Starter
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Re: 7.3 cutting out around 2000 rpm

Well, I got it figured out. When it first stopped running (bc the ipr came unplugged) the first thing I did was swap out the CPS, turns out the new one I put it was bad. when I got it running again the other day it wasnt running right an was popping and cutting out around 2000 rpms. I put the old CPS back in and it's running great!
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