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It's Alive!!!!! Sorta... 74 450SE Finally Runs
Well, good progress today and it starts! It's not running real good but it can at least move under it's own power.
On suggestions from Peter to check out the pressure sensor I found that it had no vacuum line running to it AND three wires on the electrical connector were broken - I don't blame it, I wouldn't have ran either. Strange thing was I could not find a vacuum line to hook up to the sensor anywhere. The car I swiped a spare sensor from had the vacuum line running down to a fitting at the back of the engine and this beast had a rubber nipple over it. I pulled off the nipple and ran some hose from it to the sensor and spliced on a new connector and it started! It first had a real high hunting idle (about 1500 - 3000) so hooked up the timing light, cranked the dist to TDC and the idle stopped hunting and speed dropped to around 1100. Now what I have is rough (sounds/feels like it is missing on one or two cyl) idle, extremely sluggish throttle response, and RPMs won't go much over 3200. I never did find the vacuum line that had went to the pressure sensor and I am starting to think the previous "mechanic" that had worked on this might have left it off when he was changing some vacuum lines as I see various "new" vacuum tees and splices. It is possible that I have the pressure sensor hooked up to the wrong spot. This car appears to have "California style" emissions controls as I see what appears to be an EGR valve on the l/h exhaust manifold, air injector pipes, and a smog pump. The 74 that I pulled a computer and the pressure sensor from did not have all this crap. I think it would be a good idea to swap in the other computer and get rid of some of this smog crap so will think on that. Brother-in-law is supposed to trailer it up to my place in a couple of weeks where it will be more convenient for me to work on so hopefully I can get to the bottom of these problems ansd mysteries then. I am quite sure that it needs injector seals as his "mechanic" just put a handful of O rings on them so they are probably sucking a bunch of air. Justin B. |
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