engine derate and check eng light please help - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 4 (permalink) Old 07-20-2009, 10:12 PM Thread Starter
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engine derate and check eng light please help

ok i have a slight problem which just showed up yesterday.
i have a 1997 f350 with stacks and a homemade intake. i had just changed the oil in it a couple of hours before this happened.after i got done washing my truck i just pulled out from the carwash when the cam sensor shut the truck off, restarted and drove away fine a couple miles down the road after a 3/4 throttle run check engine light came on and my engine was derated, no power at all. so i pulled off into a parking lot kinda idling funny and check my gauges and that no hpop oil was leaking out the reservoir nothing was wrong. after i shut the truck off and restarted after a minute truck was fine power up the a** till after a mile down the road again check engine light and no power again shut it off and restarted and on my way i went. now today while i was running it after the 3/4 throttle the check engine light came on and no noticable drop in power

i might also add that the sensor that went into the stock airbox is not installed into my tubing for the new intake but ive never had this problem after installing it two months prior today
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post #2 of 4 (permalink) Old 07-21-2009, 02:46 AM
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Re: engine derate and check eng light please help

We need to know a little more about the truck wash. Did you wash the motor off? Did the map sensor get wet, or the cps hold water in the plug that is interfering with the signal. Really need to know what got wet?
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post #3 of 4 (permalink) Old 07-21-2009, 03:25 AM
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Re: engine derate and check eng light please help

or maybe the IDM got water in it...

'94 F250 supercab 4x4, original owner, 4.10LS, DIY elec fuel, Tymar air, Beans tunes on VA 4 position chip, Adrenaline HPOP, VDO boost/pyro/outside temp gauges, Ford digital AIC, DPPI downpipe, gutted EBPV, modded turbo ped, Con OFE, add-a-leafs front/rear, Monroe Reflex shocks, Milemarker 449SS hubs...coming soon: 6.0 IC...wish list: Stage 2's
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post #4 of 4 (permalink) Old 07-21-2009, 12:11 PM
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Re: engine derate and check eng light please help

Can you or some one you know pull codes out of it?

"It's JUSTa 7.3"

His - 01 F-350 Reg cab 4x4 auto
Hers - 00 F-350 Crew long bed 4x4 auto
Kids - 01 EX Limited
Toy - 97 F-350 Reg cab 4X4 5spd

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