Extended Power
New Member
- Joined
- November 9, 2013
- Messages
- 7
- Reaction score
- 0
- City, State
- Alberta
- Year, Model & Trim Level
- 1996 Ford Explorer
My wife and I bought our daughter a 1996 Ford Explorer with the 4.0L in it.
We bought it knowing it was drinking coolant...hence the price.
I read the threads about how, and what was involved with the job, and I was ready to go.
One head was cracked, so I just had a set rebuilt with hardened seats installed in the exhaust, as well as new guides and valves. (The shop had an exact match to my set.)
Went with the Fel-Pro head gaskets, valve cover gaskets (not the cork crap) bought all new rocker arms, push rods and roller lifters, as it had a slight tick at idle.
Now...I am a guy who just can't leave anything stock...and I'm already cursing this forum for showing me the CAI, MAF sensor, and throttle body mods. I did them all....
So I'm using an AFE Pro-Dry filter in front of the modified MAF sensor, and the stock rubber boot to the throttle body.
Got it all back together, and started it up.
Normal ticks until the new oil reached all the components, and then it ran so smooth and quiet, you'd swear it was a brand new truck again. I was proud.
Then after about 3-5 minutes of idling time, and me playing with the throttle, the idle got extremely rough, and began to run like poo.
Hooked up my scan tool, and noticed that the short term fuel trim was pinned at 42.2 on both banks. (Mechanic said it should never be over + or - 5.)
He said to unhook the MAF sensor, and cycle the key 5 times to load a default MAF value into it.
Well that worked until I tried to hook up the MAF sensor again.
So there are no codes at all...NONE.
O2 sensors are both updating their values, so they work.
I tried using starter fluid to find any vacuum leaks, but none found...I even gave a short shot into the air filter just to make sure the rpm would change...it did.
Is there any chance that by removing the restrictive "tower" inside the MAF sensor, that it is getting way too much unmeasured air now?
Sorry for the long second post.
We bought it knowing it was drinking coolant...hence the price.
I read the threads about how, and what was involved with the job, and I was ready to go.
One head was cracked, so I just had a set rebuilt with hardened seats installed in the exhaust, as well as new guides and valves. (The shop had an exact match to my set.)
Went with the Fel-Pro head gaskets, valve cover gaskets (not the cork crap) bought all new rocker arms, push rods and roller lifters, as it had a slight tick at idle.
Now...I am a guy who just can't leave anything stock...and I'm already cursing this forum for showing me the CAI, MAF sensor, and throttle body mods. I did them all....
So I'm using an AFE Pro-Dry filter in front of the modified MAF sensor, and the stock rubber boot to the throttle body.
Got it all back together, and started it up.
Normal ticks until the new oil reached all the components, and then it ran so smooth and quiet, you'd swear it was a brand new truck again. I was proud.
Then after about 3-5 minutes of idling time, and me playing with the throttle, the idle got extremely rough, and began to run like poo.
Hooked up my scan tool, and noticed that the short term fuel trim was pinned at 42.2 on both banks. (Mechanic said it should never be over + or - 5.)
He said to unhook the MAF sensor, and cycle the key 5 times to load a default MAF value into it.
Well that worked until I tried to hook up the MAF sensor again.
So there are no codes at all...NONE.
O2 sensors are both updating their values, so they work.
I tried using starter fluid to find any vacuum leaks, but none found...I even gave a short shot into the air filter just to make sure the rpm would change...it did.
Is there any chance that by removing the restrictive "tower" inside the MAF sensor, that it is getting way too much unmeasured air now?
Sorry for the long second post.
