Engine Miss - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 04-09-2007, 10:08 AM Thread Starter
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Engine Miss

Well i let my friend take my truck to school today so he could scan it and figure out what is happening with my truck. When i accelerate my enginge will start to miss/chug at about 2000 rpms and when i have the chip on it will do it earlier in the rpm range as i increase the hp setting on the chip. I just got a call from him saying the only two codes that he got were P0196 and P0236. He did a cyclinder balance test and a injector test and everything passed. Any ideas?
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1996 Ford F350 Regular Cab 5spd with the 7.3L PSD, 4x4, 35.5x12.5x16.5 All-Terrain T/A's, 3.73s', DIY Electric Reg Return Fuel Sys, 3" Downpipe, AFE Stg 2, 17* HPOP, IDM Mod, SB Con-O, Cat and Muffler Delete, AutoMeter NV Series Boost, Fuel Press. and Pyro, Autometer 3 Pod A-Pillar, TS Performance 6 Pos Chip. HPX Mod, 335,000 Miles
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post #2 of 8 Old 04-09-2007, 10:15 AM
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Originally Posted by squeeks View Post
Well i let my friend take my truck to school today so he could scan it and figure out what is happening with my truck. When i accelerate my enginge will start to miss/chug at about 2000 rpms and when i have the chip on it will do it earlier in the rpm range as i increase the hp setting on the chip. I just got a call from him saying the only two codes that he got were P0196 and P0236. He did a cyclinder balance test and a injector test and everything passed. Any ideas?
Thanks
If you give me about 2 hours I will be home from work and I can look up some info for you and let you know what might fix your problem.


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2005 6.0 Crew Cab Long Box Lariat, current truck

2004 6.0 destroyed by contaminated fuel

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post #3 of 8 Old 04-09-2007, 10:27 AM
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p0196 means that the temp was not high enough to run cylinder balance test , p0236 is a map sensor code , need to check line going to intake from map sensor and make cure not cracked , and make sure fitting going into intake isnt clogged, either way , dont see these causing your problems , is oil in good shape and full and do you have access to run a fuel pressure test, may want to let engine get warmer and run cyl. contribution test again , go from there

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post #4 of 8 Old 04-09-2007, 10:30 AM
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well the 0196 is engine oil temp circut engine not warm enough to run and
the 0236 map turbo boost sensor a ckt performance inferred map signal restricted inlet/exhaust /supplyhose,or missing hose.
sounds to me that either the hose that hooks up to the map sensor and the intake popped off or your ebpv is closing on you

96 f350 crew cab ex cab 8ft bed duelly.3"dp,4"ex gutted cat,no muff.shimmed fpr.17*hpop,rosewood diy injectors.6 pos chip 6L intercooler. i think im hooked
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post #5 of 8 Old 04-13-2007, 11:55 AM Thread Starter
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well, i just checked my fuel pressure today and at idle i got 45psi but it was jumping around radically from 45-70psi and if i revved it up it made it unreadable, somewhere i remember someone saying that if your fuel pressure was jumping around alot it meant your injector o-rings were shot, is that true?
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1996 Ford F350 Regular Cab 5spd with the 7.3L PSD, 4x4, 35.5x12.5x16.5 All-Terrain T/A's, 3.73s', DIY Electric Reg Return Fuel Sys, 3" Downpipe, AFE Stg 2, 17* HPOP, IDM Mod, SB Con-O, Cat and Muffler Delete, AutoMeter NV Series Boost, Fuel Press. and Pyro, Autometer 3 Pod A-Pillar, TS Performance 6 Pos Chip. HPX Mod, 335,000 Miles
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post #6 of 8 Old 04-13-2007, 12:01 PM
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absolutly not that is normal for that model with manual pump, the pump rides on a cam lobe as the pump goes up and down so does the gauge reading , sounds like you have normal fuel pressure

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post #7 of 8 Old 04-13-2007, 08:19 PM
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hey you have to make sure that your engine oil temp is above 170 degrees so basically just get it up to operating temp...the 0236 is a turbo boost sensor performance issue...i have that on mine and i haven't noticed anything odd about my tranny's shift points and its been on there for about a year now...it could have something to do with the chip. I had a miss and it was injector number 6 failing...so they replaced it and now there is no miss...just make sure that when you run cylinder contribution that the engine is fully warmed up and the oil is over 170 degrees...the test it self is actually pretty long...also when doing the injector buzz make sure that you run that test in the morning when the engine hasn't been run...for some reason it responds better when you do this.
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post #8 of 8 Old 04-13-2007, 08:22 PM
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that is absolutely normal for a fuel pressure guage to do that on our model trucks...don't worry about that if the engine runs your pump is most likely alright i think you only need about 30 PSI for the engine to pop off...the ford book says that the fuel pressure range should be at 30-70 psi in park at idle.
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