Hughes Airgap causing issues
#11
Yes, the fuel rail mounting brackets definitely could have been done better. I can tell you, however, that the angle my injectors sit at now has no negative effect on the engine in any way. It runs perfectly and has good power at all RPMs.
I had no issues with any of the threads on the intake...although some thread sealant or RTV on the threads of that plug may help to stop the leak
Speaking of power gains, I noticed the most difference in the upper RPM range (say, above 3000 rpm). The upper rpms is where the stock magnum engine really falls on its face. Before installing the airgap, this upper-rpm deficiency was painfully obvious to me, even with the SCT tuner. After the airgap, the truck pulls significantly better into the upper rpms...I'm interested to see how the truck behaves when I get around to doing headers, roller rockers, and replacing the timing chain.
I had no issues with any of the threads on the intake...although some thread sealant or RTV on the threads of that plug may help to stop the leak
Speaking of power gains, I noticed the most difference in the upper RPM range (say, above 3000 rpm). The upper rpms is where the stock magnum engine really falls on its face. Before installing the airgap, this upper-rpm deficiency was painfully obvious to me, even with the SCT tuner. After the airgap, the truck pulls significantly better into the upper rpms...I'm interested to see how the truck behaves when I get around to doing headers, roller rockers, and replacing the timing chain.
#12
The AirGap definitely pushes the power up in the RPM range... you initially loose some at the bottom end... but with headers and a good exhaust, you get that back, plus some.
For me, it starts coming to life just over 2000rpm, but beyond 3000rpm it really wants to get up and go (keep in mind I'm only a 5.2).
My next move is some 1.7H&S roller rockers.
For me, it starts coming to life just over 2000rpm, but beyond 3000rpm it really wants to get up and go (keep in mind I'm only a 5.2).
My next move is some 1.7H&S roller rockers.
#13
The replacement fuel line still was not doing it for me. It was still running fine, but I checked on it at work and noticed the end of the hose was damp with fuel. So I had an emergency repair session in the grocery store parking lot and was able to get quality soft fuel line and clamp it on tight. Should be good to go now.
I will wait for the relearn process to finish before I judge too harshly. I think my O2 sensors need replaced and it is causing me to run rich, I swear I can see the gas gauge moving as I drive. I don't know or sure if they have ever been replaced, motor has 150k on it. I think they needed replaced anyways, but they started throwing codes during the intake install, not sure if coincidence or they are related.
I will wait for the relearn process to finish before I judge too harshly. I think my O2 sensors need replaced and it is causing me to run rich, I swear I can see the gas gauge moving as I drive. I don't know or sure if they have ever been replaced, motor has 150k on it. I think they needed replaced anyways, but they started throwing codes during the intake install, not sure if coincidence or they are related.
#14
oh yea I forgot to mention that I also didn't use that garbage hard plastic fuel line either...went and got some fuel injection hose and injection clamps from advance and threw those on there...no problems. My upstream oxygen sensor went bad at 90k miles...caused all kinds of hell for me and never threw a code!
Do you have an SCT tuner to use on your durango? That will do wonders for your engine computer...
Do you have an SCT tuner to use on your durango? That will do wonders for your engine computer...
#15
Is it Denso snesors that people have good luck using with our trucks, and Bosch that causes issues? And just the upstream that really matters? Looking at rockauto now. I saw you had mentioned the fuel hose in your build thread, but it was after I had already finished the install unfortunately.
I have a superchips in it now. I know the SCT are much preferred, but I didn't realize that when I got the superchips several years ago. I got it used off ebay when I had my Ram. I was really close to getting the SCT at one point but talked myself out of it because I don't drive it much. I think I got the intake like six months ago and jsut now got around to installing it. If I ever do more to it, SCT will be the next step.
I have a superchips in it now. I know the SCT are much preferred, but I didn't realize that when I got the superchips several years ago. I got it used off ebay when I had my Ram. I was really close to getting the SCT at one point but talked myself out of it because I don't drive it much. I think I got the intake like six months ago and jsut now got around to installing it. If I ever do more to it, SCT will be the next step.
#16
Yea I make it a rule to go with the "D" brands when ordering any replacement electronic part for my truck (denso or delphi)...i believe our trucks like NTK o2 sensors as well tho. Stay away from the bosch ones if possible...the upstream sensor is what will affect how the truck runs and idles but it's a good idea to replace both at the same time.
I started out with a superchips on my truck but once I discovered how well the airgap behaves with the SCT, I switched tuners and sold my superchips on ebay.
I started out with a superchips on my truck but once I discovered how well the airgap behaves with the SCT, I switched tuners and sold my superchips on ebay.
#17
So the issue has returned. Not sure where to go from here. I think its an elusive vacuum leak. It acts like its starving for fuel and tries to die, then the motor tries to over compensate, then triedsto die again, repeatedly until i get back on the throttle. It doesnt have to be much, just ease into it and it pulls out of it with a rough lurch. I dont understand how it runs so smooth with even the slightest throttle. It makes me consider the TPS or IAC sensors being a possible issue.
My big fear is that I botched the seal at the front and rear of the intake where those thick rubber gaskets are "supposed' to go (i didnt use them) and I will basically need to pull the intake and start over. So what works well to fill in that gap?
My big fear is that I botched the seal at the front and rear of the intake where those thick rubber gaskets are "supposed' to go (i didnt use them) and I will basically need to pull the intake and start over. So what works well to fill in that gap?
Last edited by AppelH; 09-13-2014 at 01:40 AM.
#18
It sounds more like your torque converter isn't releasing to me. Might just be the way I understand your description. Try popping it into neutral next time you're coming up to a stop when its trying surge. Does the motor smooth out without applying gas? You might have pinched a wire when going back together with it, but this is just speculation on my part.
#19
It seemed like when this was first happening, popping it into neutral would work. Now it keeps doing it seemingly regardless. Twice I had come all the way to a stop and put it in park and it kept doing it until it eventually died.
This morning when I drove it, it did fine for about the first ten minutes. Once it got to operating temp, i romped on it up to about 50, and it starting having its issue. Same thing happened yesterday. Not sure if that indicates anything.
This morning when I drove it, it did fine for about the first ten minutes. Once it got to operating temp, i romped on it up to about 50, and it starting having its issue. Same thing happened yesterday. Not sure if that indicates anything.
#20