Air Pump question
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Freshman User
Joined: Apr 2003
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From: North Georgia
Air Pump question
I have a '94 F250 with a stock 351w. I replaced the bad exhaust manifolds with a pair of Flowtech shorty headers. There is no place to install the tubing for the air pump! So for now it's just winding and blowing air to no where. Is there any way to retro fit the air pump to a pair of shorty headers like these? Is it even worth my while? Where I live there are no emission inspections. How will running the truck affect the cat without the smog pump?
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
For some reason Ford equipped the HD trucks with a different air injection system than what the LD trucks got... air is pumped into the back of the heads instead of the exhaust manifolds. All the motors are the same so you could retrofit the F150 style system 351smoglines on Flickr - Photo Sharing!, but you could just as easily remove all that plumbing and valves and just let the air pump stay there and act as an idler wheel. If you do that be sure to plug the vacuum lines on the TAB and TAD solenoids next to the coil.TABTAD1 on Flickr - Photo Sharing!
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Freshman User
Joined: Apr 2003
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From: North Georgia
Thanks for the responses. Today (one day out of the shop) the truck quit running while driving it home. After a few minutes it finally cranked alive and I got it home. It wouldn't start again. Just cranked. About 8 hours later it started right up. I shut it off and had dinner. After dinner I went out to start it to see if maybe the coil was getting hot. It started and after about three seconds it shut itself off. I haven't had time yet to plug off the vacuum lines to the TAB and TAD solenoids. Would these have anything to do with this problem?
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Freshman User
Joined: Apr 2003
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From: North Georgia
Forget that last post. I found the problem. The shop mechanic jerked the two wires loose from the harness that plugs into the bottom of the coil. Nothing my soldering gun couldn't fix.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
The whole vacuum harness will lift off the motor if you really want to clean things up, you still need a few lines though for the FPR and EGR solenoid if it's still there. But if you don't want to get into that just plug the ends of them where they would attach to the valves.
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Tuned
Joined: Aug 2009
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From: British Columbia
I have a red plastic vac line and a yellow one that go nowhere. Do I just plug them at the tab and tag?
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FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Yeah they would have been connected to the diverter valves, if you can't figure out a way to plug them at the ends then yes do it at the solenoids, I believe it's the top port you want to plug.. whatever one is connected to those lines obviously.
Tuned
Joined: Aug 2009
Posts: 274
Likes: 4
From: British Columbia
Now that I've gone to this point on the engine swap, is it possible to dump all the ERG valve stuff as well. I have a cracked pipe connecting the ERG valve to the manifold , a replacement is $187.00
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