Join Date: Feb 2014
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low on power, missing, and intermitent no throttle response
1997 f250 psd 5spd 232k miles, no chips or anything
Yesterday the truck cranked and cranked then just fired right up like it was fine. It will idle fine, but then when I bring the rpm's up, it will do one or both, start missing, when the rpm's drop back to idle they will drop past idle to 450-500 then come back up in a couple seconds. When driving I either have throttle response and it feels a little low on power or it misses some, or I have no throttle response and I end up costing down to idle. It has died on me 2x a minute or so after start up but started back up after a little cranking, seemed like it didn't have enough fuel.
I have an autel al619 and ran the codes but didn't find any. I have heard that only some scanners will pull codes on these trucks though.
Since buying the truck I have replaced the cps (international replacement part), tps, converted to single mass, fuel filter, and cleaned the ipr and put new o-rings on it. The issue started before I did the tps, fuel filter, and single mass ast week, and was not fixed. All of this has been within 6 months.
Im thinking from everything that I have read that it is my idm. It seems to me that my injectors are firing randomly sometimes and/or at the wrong time in the combustion cycle.
I would greatly appreciate any feed back before I spend money on parts, I can't afford to buy things I don't need at the moment.
97 f250 eclb 5spd, 232k miles, 4in lift, 35s, custom bumper and headache rack with lots of LED's, heavy duty LUK clutch and single mass, lots of maintenance, ebpv on a switch, starting performance upgrades soon (hopefully)