Hummer Forums - Enthusiast Forum for Hummer Owners
plenum mounting bolts, air filter hose removed
plenum mounting bolts, air filter hose removed
0 2009/05/09 17:42:57
plenum bolt
plenum bolt
0 2009/05/09 17:42:57
short hose from plenum to intake removed
short hose from plenum to intake removed
0 2009/05/09 17:42:57
After removing the long and short air hose and 2 mounting bolts holding the plenum, it can be moved out of the way. There is a drainback hose in the rear on a barbed fitting that can just be pulled off to completely remove the plenum. Here are the ignition modules under the plenum.
After removing the long and short air hose and 2 mounting bolts holding the plenum, it can be moved out of the way. There is a drainback hose in the rear on a barbed fitting that can just be pulled off to completely remove the plenum. Here are the ignition modules under the plenum.
0 2009/05/09 17:44:58
There is a single 10 mm holding in each Delphi module. Once removed, the entire assembly slides up and off of the spark plug. On the front most cylinder, the wiring harness has to be moved to allow removal of the module. Remove the cap on the wireway cover and there are 2 plastic fasteners holding it in place. These can be rotated and screwed down through the slot in the bottom of the wireway using a screw driver. The cover can be seen in the previous picture.
There is a single 10 mm holding in each Delphi module. Once removed, the entire assembly slides up and off of the spark plug. On the front most cylinder, the wiring harness has to be moved to allow removal of the module. Remove the cap on the wireway cover and there are 2 plastic fasteners holding it in place. These can be rotated and screwed down through the slot in the bottom of the wireway using a screw driver. The cover can be seen in the previous picture.
0 2009/05/09 17:44:58
This is the spark plug port with the plug removed. The module is adjacent in the picture. Please note: check the overall length of the spark plugs you intend to use by comparing them with the old ones. I found that some of the manufactures don't make them a little shorter and this could cause a misfire with the contact in the ignition module. It's like a spring contact in a flashlight and needs the length to make contact. If the module isn't held up by the force of the spring before tightening them down, check the length on the plugs. Reassemble in the reverse order and you've got it. I would suggest using the AC Delco Iridium plugs. They made my H3 purr like a kitten at 111K.
This is the spark plug port with the plug removed. The module is adjacent in the picture. Please note: check the overall length of the spark plugs you intend to use by comparing them with the old ones. I found that some of the manufactures don't make them a little shorter and this could cause a misfire with the contact in the ignition module. It's like a spring contact in a flashlight and needs the length to make contact. If the module isn't held up by the force of the spring before tightening them down, check the length on the plugs. Reassemble in the reverse order and you've got it. I would suggest using the AC Delco Iridium plugs. They made my H3 purr like a kitten at 111K.
0 2009/05/09 17:44:58