Krafty
New member
Hey guys, Have some questions for some of you more Efi experienced persons. 1989 F150 302 efi 4x4 aod auto. I swapped my oil spewing 302 for an engine out of a 1990( I was told) f150 2wd 302 efi. swap went alright got everything hooked up the way its supposed to. drove it for a while an noticed it ran alright most of the time but anything over 1/2 throttle and it just bogs and refuses to rev any higher. sounds like throttle position sensor( haven't changed it yet).
also thought it could be the cat so i cut it out with no change.
But here is where it gets weird, right as soon as I put it in and got it running my oil pressure and temperature gauges refused to work, I even swapped in my sensors from my 89 engine which all worked fine before, and no change those 2 gauges are completely dead. Plumbed in a mechanical oil pressure gauge and I have great pressure.
so which leads me to my question. does anyone know of any wiring differences between the motors 89 and 90(?) being as i'm having multiple sensor issues , the connectors on the wiring harness are colour coated and i'm not colour blind and are hooked up right as far as I know.
now that I think of it its kinda acting like it did after the last motor blew except for not spewing oil and my gauges worked before. I attributed my power loss to the piston rings that got fried but could it just be that my ECM is on its last legs?
this thing is driving me nuts, I've had it just over a year and I'm getting tired of having something I have to fix every couple weeks.
also thought it could be the cat so i cut it out with no change.
But here is where it gets weird, right as soon as I put it in and got it running my oil pressure and temperature gauges refused to work, I even swapped in my sensors from my 89 engine which all worked fine before, and no change those 2 gauges are completely dead. Plumbed in a mechanical oil pressure gauge and I have great pressure.
so which leads me to my question. does anyone know of any wiring differences between the motors 89 and 90(?) being as i'm having multiple sensor issues , the connectors on the wiring harness are colour coated and i'm not colour blind and are hooked up right as far as I know.
now that I think of it its kinda acting like it did after the last motor blew except for not spewing oil and my gauges worked before. I attributed my power loss to the piston rings that got fried but could it just be that my ECM is on its last legs?
this thing is driving me nuts, I've had it just over a year and I'm getting tired of having something I have to fix every couple weeks.
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