running / air injection problem
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running / air injection problem
I replaced my 1994 E250 4.9L-6 with one from a 1991 F150. The F150 had air injection in the head, my 1994 did not. I kept the 1991 setup because it was easier.
I thought when putting it in that the air injection system from the 1991 might have problems, as it would cause the O2 sensor to read different values for mixture than what was actually combusting, but I wasn't sure how to remove / plug the air injection tube as the fittings into the head are very rusty. To remove the air injection I'd have to cut the tube off and then use a socket, at which point i'm committed to removing the system.
long story short, my van idles ok (not great) and runs down the road ok for a little, but it will only take a load for a few minutes before losing all power. It think it's the air injection but i'm still not sure. I double checked all vaccum lines and they seem ok.
I did a forum search and found out that ford makes plugs for the head, but i can't find this part online, or a size bolt for the 4.9L (300) so I can get the plugs ahead of time
any suggestions on this?
I thought when putting it in that the air injection system from the 1991 might have problems, as it would cause the O2 sensor to read different values for mixture than what was actually combusting, but I wasn't sure how to remove / plug the air injection tube as the fittings into the head are very rusty. To remove the air injection I'd have to cut the tube off and then use a socket, at which point i'm committed to removing the system.
long story short, my van idles ok (not great) and runs down the road ok for a little, but it will only take a load for a few minutes before losing all power. It think it's the air injection but i'm still not sure. I double checked all vaccum lines and they seem ok.
I did a forum search and found out that ford makes plugs for the head, but i can't find this part online, or a size bolt for the 4.9L (300) so I can get the plugs ahead of time
any suggestions on this?
