1171&1174 Helpme Oprah, helpme Tom Cruz

Lowest bidder might be on to something. I used seafoam on my last post. I poured it into the vacuum of the intake and it sucked it in nicely revving the engine each time. Now, as the smoke pressure increased inside the engine, sometimes with a heavy pour during the application of seafoam, I would see smoke bellowing from under the engine on the passenger side (right side) of the engine. It would only happen during a heavy pour of seafoam through the vacuum tube and I only let that happen two or three times(not on purpose). After the application, I reattached the vacuum hose and revved the engine a couple times. If thick white smoke bellowed from the exhaust pipe, then I would get some smoke (exhaust) coming from underneath as well, but only during thick white smoke from the actual exhaust pipe. The update is though that after the seafoam treatment I made it to 150 miles before the light came on with only one code 1174. I monitored the voltage graph on the upstream O2 sensors and it did show that bank 2 was spiking slightly higher than bank one. Bank one was pretty steady with a flat line. The computer was just taking its time in completing the three remaining tests and that's why I got to 150 miles. It never completed them on this run. I think the seafoam is working, so I re-administered an additional bottle through the vacuum and then checked the voltage graph again. The graph showed Bank one and two are now tracking evenly. Tomorrow she is going on a long journey, the chk eng light is currently off (reset) and the tests are going to run tomorrow.(I hope) Fingers crossed that this fixed the current issue, but I will check the exhaust for leaks if this fails. I'll slap some hooker headers on that baby with some glass packs and a hurst stick shift, oh wait that was so thirty years ago, got carried away with a red neck turret, sorry.

Update: Well I lifted up the truck, got underneath it look'n for exhaust leaks. Revved it, turned it off and on, blah, blah, blah. Tight as a blahbady blah on a blah blah. No leaks, but there is a development. Three kids and wife in the car waiting for chic-fil-a order sitting in drive through I may have caught a break. I heard a new noise, a whistling coming from under the hood. I was praying for it to keep whistling long enough to get the food and go park so I could pop the hood. Sure enough and whistle of unknown origin, a vacuum leak. I couldn't find it though. I got home, pulled into the driveway and put it in park. I jumped out and called my neighbor over to help me find it. I grabbed a length of tubing and started looking and bam, it disappeared. Can you believe that, gone and unknown. I know I have a leek though. We turned it off to cool down, turned it back on and a few revs later it was back. Still very hard to find, I fed the hose under the intake manifold and I found it about three quarters of the way in. So tomorrow I have to tear it back down, but I did find a leak. I don't know if it is "the" leak, but I have a feeling that it is. It could be a valve cover gasket leak or intake gasket leak. I did just replace the intake gasket though.

Good Bye 1174 & 1171. I will not miss you. Well, it is over. In addition to everything I just tore down the engine again, it gets easier every time, and rebuilt the injectors and replaced the lower "valley pan" gasket. Once in there, it was totally toast. The two rubber seals at the front and back were basically gone. In hind sight I should have just replaced all the intake seals&gaskets the first time. The head gaskets are just going to have to wait, but I will keep an eye on them. Also, the spliced O2 wires did not make a difference. After I fired her up after the rebuild I had no codes, the computer did all it's tests within twenty miles, using the idol for 30 mins, 35 MPH for 5, 45 MPH for 5, then 55+MPH technique. So the 1174&1171 problem, Vacuum Leak, for sure. The o rings on the injectors were hard as a rock. Here are some after pics: