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I solved my rough idle problem on the Expy yesterday. The biggest clue was that it was throwing a P0174 code (System to lean – bank 2) which got me looking for a vacuum leak. I discovered that the Dorman replacement intake manifold that I put back on requires that you install an o-ring on the PCV tap off point. This is not in the instructions for the manifold! The PCV tap installs into the manifold and then you rotate it 90 degrees to lock it down. I got looking at the bag of parts that came with the manifold and noticed an o-ring was left over after I installed everything. So I had a giant vacuum leak without it. So the IAC valve was not the problem in this case.
Yes – ford uses a hose that is attached to the IAC valve on one side and the intake snorkel on the other side to tap off air flow after it has been measured by the MAF. This hose has a small black box installed in it. The best guess I have is that it’s used to reduce noisy airflow in the idle circuit.
I did not replace the IAC after the engine swap because the one that I have is not that old. I took it off yesterday and it is spotless inside. I was careful with all the vacuum lines when I put the motor back together so I think vac leaks are not the cause of my problem.
The symptoms scream “IAC”. I wonder if the aftermarket IAC valves have a pretty high failure rate? I am headed to NAPA to pony up another 50 bucks on this project! I’ll report back if this fixes my problem.
Yes – ford uses a hose that is attached to the IAC valve on one side and the intake snorkel on the other side to tap off air flow after it has been measured by the MAF. This hose has a small black box installed in it. The best guess I have is that it’s used to reduce noisy airflow in the idle circuit.
I did not replace the IAC after the engine swap because the one that I have is not that old. I took it off yesterday and it is spotless inside. I was careful with all the vacuum lines when I put the motor back together so I think vac leaks are not the cause of my problem.
The symptoms scream “IAC”. I wonder if the aftermarket IAC valves have a pretty high failure rate? I am headed to NAPA to pony up another 50 bucks on this project! I’ll report back if this fixes my problem.
Well I experienced another epic fail today. I just finished working on my 2000 Ford Expy and was cleaning up my tools. I reached over and grabbed the air hose about 2 feet back from where it plugs into the compressor. I used the other hand to pull back the release. The air hose connector shot out of the compressor, swung around the perfect radius I had created and smacked me right above my right eye. I now have a grape sized knot above my right eyebrow.
Safety glasses saved my bacon. I even have a pressure regulator that I could have turned down before disconnecting. Never saw it coming. Dumb, Dumb, Dumb…
Well I experienced another epic fail today. I just finished working on my 2000 Ford Expy and was cleaning up my tools. I reached over and grabbed the air hose about 2 feet back from where it plugs into the compressor. I used the other hand to pull back the release. The air hose connector shot out of the compressor, swung around the perfect radius I had created and smacked me right above my right eye. I now have a grape sized knot above my right eyebrow.
Safety glasses saved my bacon. I even have a pressure regulator that I could have turned down before disconnecting. Never saw it coming. Dumb, Dumb, Dumb…
I had absolutely no idea this type of technology existed for intake manifolds. I have never owned a vehicle nice enough to use this. I liked the video because I learned something new. This also happened with the VTEC video – I often wondered how variable valve timing might be achieved. I wonder if all the mechanical complexity introduced by the 2 stage really makes that big a difference in performance. Maybe my car brand of choice will start using them someday.
I had absolutely no idea this type of technology existed for intake manifolds. I have never owned a vehicle nice enough to use this. I liked the video because I learned something new. This also happened with the VTEC video – I often wondered how variable valve timing might be achieved. I wonder if all the mechanical complexity introduced by the 2 stage really makes that big a difference in performance. Maybe my car brand of choice will start using them someday.
I had the front coil spring of a Olds Delta 88 wiggle out of a spring compressor once. I thought someone came into my garage and fired a shotgun. The spring just vanished. I found it in the yard. This made me a fan of macpherson struts & automotive machine shops.
I had the front coil spring of a Olds Delta 88 wiggle out of a spring compressor once. I thought someone came into my garage and fired a shotgun. The spring just vanished. I found it in the yard. This made me a fan of macpherson struts & automotive machine shops.
I was changing the ball joints on a 1973 plymouth valiant when I was a 17 year old kid. I really didn’t understand the concept of torsion bars and how they work until I removed the nut and tapped on the ball joint stud a few times until the torsion bar unloaded violently. Scared the fool out of me. Dumb, Dumb, Dumb. I have never owned a car with torsion bars since.
I was changing the ball joints on a 1973 plymouth valiant when I was a 17 year old kid. I really didn’t understand the concept of torsion bars and how they work until I removed the nut and tapped on the ball joint stud a few times until the torsion bar unloaded violently. Scared the fool out of me. Dumb, Dumb, Dumb. I have never owned a car with torsion bars since.
I noticed this right away when I watched the videos. I have often cursed at not having a lift as a DIYer. I really like the fact Eric does it the hard way like I have to.
I usually up the ante by working outside in the weather under an EZ-UP. This is no small inconvenience when you live in South Florida where we get a storm every 15 minutes and then it’s blistering hot for the next 15 minutes.
I noticed this right away when I watched the videos. I have often cursed at not having a lift as a DIYer. I really like the fact Eric does it the hard way like I have to.
I usually up the ante by working outside in the weather under an EZ-UP. This is no small inconvenience when you live in South Florida where we get a storm every 15 minutes and then it’s blistering hot for the next 15 minutes.
I went and got an EE degree from University of South Florida. I don’t regret my decision at all. It’s nice to have a complete understanding of electricity and electronics. If I had to do it over again I would have specialized in digital electronics (I chose radio frequency). Digital engineers are usually involved in all the circuitry (hardware & software) that controls things. Almost all products require this type of design work. Good luck making your decision.
I went and got an EE degree from University of South Florida. I don’t regret my decision at all. It’s nice to have a complete understanding of electricity and electronics. If I had to do it over again I would have specialized in digital electronics (I chose radio frequency). Digital engineers are usually involved in all the circuitry (hardware & software) that controls things. Almost all products require this type of design work. Good luck making your decision.