1987 351W emission issues
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1987 351W emission issues
I have an 87 F-250 351W The air pump and most of the emissions were removed from the truck I am trying to get it running again,my question is can I remove the rest of the emissions (EGR valve ect ) or do I have to reinstall all of the apperatus to make it work right.I think the previous owner removed the emissions for the tuned exahust that he put on it.The motor sounds good but does'nt idle well. Any help would be greatly appreciated Thanks Dave
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You should be OK as is. Make sure the plugs are good and properly gapped. Check plugs wires and make sure they are good. Check all the vacuum pipes for cracking along with the crankcase vent tubes. You could also check for vacuum leaks around throttle body. You may also need to clean the Idle Air Control valve. Go to fordfuelinjection.com for instructions on how to do this. While there you could read up on how to pull any stored error codes without a code reader.
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Thanks Lazy K I will check that site out,the vacuum system is a mess and needs to be cleaned up I found the vacuum advance from the distributor just dead ended after 8 feet of tubing.Some people just should'nt work on vehicles LOL Thanks again
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From: McKenzie River
87 351w in a F-250 should be a 4180 holley 4bbl, not EFI. Emission hose routing is complicated but should be shown on the underhood sticker. If you dont have Emiss. testing where you live, it should be fairly straight forward removal, then re-tuning after all the garbage is gone.
Post Fiend
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87 351w in a F-250 should be a 4180 holley 4bbl, not EFI. Emission hose routing is complicated but should be shown on the underhood sticker. If you dont have Emiss. testing where you live, it should be fairly straight forward removal, then re-tuning after all the garbage is gone.
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From: McKenzie River
Lots of folks make that mistake, 351w and 460 both carbed still in 87.................But I love Holley 4bbls!
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Yes but isn`t the computerized crap so much more fun?
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Post Fiend
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From: McKenzie River
Fun?.........I have some words to describe it, but most are unprintable on FTE......Fun is NOT among them! hahaha!
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I'm getting mixed reviews about the EGR valve some say plug it' and others say remove and cap it off???Thanks old93junk yes it does have a holly 4180 just rebuilt it came out sweet. I just need to fix the vacuum issues and will be rollin again...
Post Fiend
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From: McKenzie River
I would remove and cap off the EGR, it just looks cleaner than a dead EGR. I fabbed a few block off plates out of 1/4 alum. plate and drilled mounting holes accordingly with a piece of high temp gasket behind it...........................Or you can just leave it sit.
pedant
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From: EXTREME southwest CT
Just cut a stainless shim to cover both holes where the actual EGR valve bolts to the neck of the spacer.
You need the PCV port on the front and likely the other manifold vacuum port as well.
You need the PCV port on the front and likely the other manifold vacuum port as well.
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I removed the carb plate and purchased a new one without the EGR stuff on it.( 40 dollars)The motor started right up,but under load she pops and hesitates I am suspecting the accelorator pump is bad,after all the truck has been sitting for two plus years Should I just replace the carb or keep with this one?
pedant
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From: EXTREME southwest CT
It is too lean because the EGR is no longer injecting inert gas into the intake stream.
There is little to adjust on the 4180 -emissions- carb, (it was purpose built to work in concert with the EGR and other emissions features of your specific vehicle) but you should try and richen the mixture to tune it.
There is little to adjust on the 4180 -emissions- carb, (it was purpose built to work in concert with the EGR and other emissions features of your specific vehicle) but you should try and richen the mixture to tune it.