Service Engine Soon P1451

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04-19-2004, 07:59 PM

#11

Casper98GT

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Join Date: Mar 2004

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Posts: 2,287

RE: Service Engine Soon P1451

HAHA. I came back to find this post and i finally found it. Well, a 97 F-150 came into my dealership today and guess what codes i pulled. a po304 and a p1451. lol. So i did a fuel injector flow test and a power balance test to make sure it wasnt the injecters. So i replaced the plug wires and plugs. Runs like a charm. Well, getting into the p1451 is a pain in the ***! Its a 33 page diag. procedure. Nice huh. Well, the first thing i did was go for the fuel cap. I figured maybe this was an older guy maybe he forgot to put his gas cap on all the way once. Well, i took off the gas cap and put it back on and no codes yet. Maybe you have youreself a bad gas cap??? try the 9.00 part and see what happens. Put a new one on and erase the code and see if it comes back. If not im gonna come back after i finally figure out if the code comes back on this guys truck. I'll keep you updated

04-19-2004, 08:05 PM

#12

Sidewayz6.0

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Join Date: Jan 2004

Location: IL

Posts: 10,637

RE: Service Engine Soon P1451

Thats funny. After thinking about it, I changed the plugs in it the day before the light came on. The only thing that I recall is that I had to loosen the fuel rail a little to get the spark plug socket on the passenger side closest to the fire wall plug. When I did that, it sprayed a little gas out of the injector. Think I might have broken it? Thats the only thing different.

07-17-2007, 08:54 AM

#13

xarva

Join Date: Jul 2007

Posts: 4

RE: Service Engine Soon P1451

Quote:

ORIGINAL: Sidewayz6.0

OKay, now where is that? I looked under the hood, there is a black canister up against the firewall on the passenger side with a black steel tube going to it, and 2 other tubes coming out. There is also a connector on the top of it. Is this what you're talking about?

FYI I recently discovered what that is its a Vapor Management Valve or "VMV" Available only from ford currently about $50.I have a p1451 and a p0443 code. I replaced my gas caps O ring already. But supposibly that VMV can be opened and sprayed with some carb cleaner to get it to work again in some cases.