Okay here it is I have a 1987 Ford F250 4wd with a 302 in it "vin type 'N' " fuel injected. I believe its the regular type 302 non HO. this thing runs like ****. all the plugs are burning clean there are no more lifter noises. It idols smooth for the most part but then sometimes it lopes. I believe its the fuel injectors. and its only getting about 8 miles to the gallon. any Ideas on what the problem is.
also I have a E7TE witch I believe is an HO. I want to put heads on it but I'd like to know what would be the best heads to use I would like some good horses but then I would like to mantain some kind of gas milage with the awsome prices we're paying. I guess my question is what am I getting myself into. Ive heard different things like fireing order, change cam, yadda yadda yadda. I would also like to stay with fuel injection. with different fireing order how would this work.
I grew up around the shop my dad was a mechanic however I didnt follow in his footsteps for too long. so Im at loss
well first the 302 is a dog in an f150 let alone an f250. the best bang for your buck would be to located an efi 5.8 and swap that in place. its a direct bolt in and will give you a 40lbs of torque gain right away. plus its easier to build power from this motor as well. not to mention the 5.8 in this size/weight of truck will get better mpg then a hi rpm motor like the 5.0.
Have you pulled the codes yet? Sounds like you have a sensor(s) that is flaking out on you. My buddies '92 Ranger had problems simular to yours. Turned out the ACT (air charge temp) sensor was telling the computer is was -30* when the real air temp was 85*.
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98 Ranger 2WD - 4.6 dohc, Ford prototype intake, custom headers, 4R70W trans, 8.8/4.10/TL, aluminum drive shaft, Lakewood traction bars,Mark VIII guages, Explorer buckets, rear auxiliary fuel tank (no midship), relocated fuel door http://281ranger.homestead.com http://www.cardomain.com/ride/2052265
when I first got this truck I spent 1200 bucks at the local ford dealership to make it pass smog the changed a bunch of stuff and couldnt make it pass. it was running way way rich. a week later i found out who new there stuff in town and took it to him. he found that there was not enough vaccuum pressure to operate all the smog stuff that ford changed. he replaced a bunch of lines and all the sudden it passed smog. so yes I believe you are correct when you say a sensor. its running pretty good right now. but it does blow lots of black smoke. and runs rough through excellaration. but its ideling perfectly right now. i also believe its the enjectors because i found a receipt in the truck for a few being changed with used ones from the wrecking yard. any thoughts on this
not it wont cause smog issues because the 5.8 was an option for your truck. just locate a wrecking yard 5.8 that is complete from intake to oil pan. the emissions stuff on your 302 will work on the 5.8. ive done this swap on my older 88 bronco before i rolled it. was the best upgrade i could have made. i gained 1 mpg in town and 2 on the hwy just from the swap. just get a low mileage motor.
okay after doing a bit more research I have found that the egr solinoid is not getting any vacuum to the egr valve and by reading the codes its a voltage problem does this mean my computer is bad??? the computer was one of the things i replaced when i got the truck because it had one from an 80's ford sable.
Ill will do that for sure. I was thinking it would be the evr because I get no vacuum to the egr and one on another web site showing what the codes mean it says something about the evr I dont know Im going to change both and see what happens
it makes sence though if the evp is not sending the right info to the ecm then the ecm will not be sending the right info to the evr wich in turn will not alow the egr to work so the unburnt fuel is not getting dumped back into the intake, hence all the black smoke Im getting. but is this enough to make it run bad? like a miss, and no power?
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