Roller motor with factory fuel injection and computer?
#1
Roller motor with factory fuel injection and computer?
I have used the search, and even brought back up a couple of old threads,but came away with not much for an answer.
I bought another 1987 Ford F150 project the other day. ( I already have a 87 4x4) This truck has a slight rod knock, but came with another engine. the engine is a 1990 model 5.0 roller motor. Will I run into any problems with installing this motor but using my factory fuel injection and computer from the truck?
I bought another 1987 Ford F150 project the other day. ( I already have a 87 4x4) This truck has a slight rod knock, but came with another engine. the engine is a 1990 model 5.0 roller motor. Will I run into any problems with installing this motor but using my factory fuel injection and computer from the truck?
#4
Be sure that it is an HO motor before you swap the plug wires. It could have came out of a crown vic/grand marquis/lincoln. Those cars all had roller cams, but used the standard(non HO) firing order. Also check the back of the block (on the top right behind the intake) for a knock sensor. If it dosent have one you may need to drill and tap a hole for it.
#5
Originally posted by FORD302GUY
Be sure that it is an HO motor before you swap the plug wires. It could have came out of a crown vic/grand marquis/lincoln. Those cars all had roller cams, but used the standard(non HO) firing order. Also check the back of the block (on the top right behind the intake) for a knock sensor. If it dosent have one you may need to drill and tap a hole for it.
Be sure that it is an HO motor before you swap the plug wires. It could have came out of a crown vic/grand marquis/lincoln. Those cars all had roller cams, but used the standard(non HO) firing order. Also check the back of the block (on the top right behind the intake) for a knock sensor. If it dosent have one you may need to drill and tap a hole for it.
The extra motor is actually a 1985 Mustang shortblock (early CFI non-roller style) but I had a friend give me a 1990 model Mustang roller shortblock.
The motor that is in the truck now is a 1986 model Mustang roller motor with E7 heads on it that started knocking when the previous owner first cranked it. He got discouraged and I got a good deal on it.
So I plan on putting the E7 heads on the 90 roller shortblock and using my factory truck computer and truck intake setup.
Last edited by KB ZILLA; 09-16-2003 at 02:25 PM.
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#8
Okay I got the motor put back in today.
I used the 90 Mustang roller shortblock with the E7 heads, factory 87 truck fuel injection and wiring. I have two computers, the 87 truck computer and a 88 5.0 Mustang auto computer.
The truck runs like crap. I have done over a dozen motor swaps and this one is pissing me off
The truck runs worse with the 87 computer, really wont even run unless you rev it up rather high.
The 88 GT computer seems to do much better, but It seems like I have a vacuum leak (power brakes are not great) and the truck will not idle unless I keep my foot on the gas. It also seems like it is skipping a slight bit.
I have another 87 truck that is a 4x4. I pulled the computer in it and put the 88 GT computer in it, seemed to run okay at first then started skipping really badly when I drove it around the block.
Any suggestions?
I used the 90 Mustang roller shortblock with the E7 heads, factory 87 truck fuel injection and wiring. I have two computers, the 87 truck computer and a 88 5.0 Mustang auto computer.
The truck runs like crap. I have done over a dozen motor swaps and this one is pissing me off
The truck runs worse with the 87 computer, really wont even run unless you rev it up rather high.
The 88 GT computer seems to do much better, but It seems like I have a vacuum leak (power brakes are not great) and the truck will not idle unless I keep my foot on the gas. It also seems like it is skipping a slight bit.
I have another 87 truck that is a 4x4. I pulled the computer in it and put the 88 GT computer in it, seemed to run okay at first then started skipping really badly when I drove it around the block.
Any suggestions?
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Originally posted by dave186
did you try using the other 87 truck computer? assuming it was running correctly before. does kind of sound like an ignition problem, but it seems odd it wont idle, any chance the distributor is a tooth off?
oh yah, nice looking garage man, whats under the cover?
did you try using the other 87 truck computer? assuming it was running correctly before. does kind of sound like an ignition problem, but it seems odd it wont idle, any chance the distributor is a tooth off?
oh yah, nice looking garage man, whats under the cover?
double and triple checked the dist. and the firing order.
Now that I have slept on it, I still think I have a vacuum leak somewhere causing my problems.
When I get home from work today I am going to remove all lines that are drawing vacuum from the motor and try to isolate the culprit.
Thanks for the compliments on my garage, I am kind of proud of it since I built it all myself.
That is my 1995 Z28 under the cover, it is a show car/ race car toy of mine. But it is mostly a Garage Queen, it hasnt left the garage since feb., I really need to sell it and put some more stuff on my Lightning!!
#12
Okay.....update.
I definaltly have a vacuum leak.
the truck runs great when cold but as soon as it warms up the least bit it starts running bad, and the power brakes suck.
I found a few small leaks from rotten vacuum hoses, that got the truck running better, and I went back to the original truck computer.
So tommorrow I am going to use some WD40 and spay around to see if I can isolate the bigger vacuum leak, I hope it is something from the upper intake or above. I hope not the lower intake.
I definaltly have a vacuum leak.
the truck runs great when cold but as soon as it warms up the least bit it starts running bad, and the power brakes suck.
I found a few small leaks from rotten vacuum hoses, that got the truck running better, and I went back to the original truck computer.
So tommorrow I am going to use some WD40 and spay around to see if I can isolate the bigger vacuum leak, I hope it is something from the upper intake or above. I hope not the lower intake.
#13