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Post by yachtsmanwilly on Nov 20, 2021 16:58:21 GMT -5
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Post by Avenger on Nov 21, 2021 0:17:06 GMT -5
There you go. They really get no respect, but they're still pretty capable, and you can't hurt the value because it has none. My friend at the scrapyard says they get perfectly good LS engines in there all the time. I told him to keep his eyes open for an aluminum one. Hopefully a 6.0L, but any of them will be an option. For a far later date obviously.
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Post by Freebird on Nov 21, 2021 14:46:18 GMT -5
Night and day difference between the '84 and the '86. I remember one of the car magazines testing the new '85 and referred to it as the car the '84 could have (should have) been. Tuned Port Injection cured the anemic crossfire and other changes/upgrades were made.
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Post by Avenger on Dec 2, 2021 16:11:58 GMT -5
I've been fiddling with this thing off and on. Mostly off. Reinstalled the sender/pickup assy in the tank. For some reason the fuel pump relay isn't energizing the pump and it's nothing obvious like a fuse, so I'll have to dig a bit deeper. In the now, I cheated and powered the pump directly and used a 9V battery to trigger the injectors. That proved that the pump was running, and that the injectors sprayed fuel. They also dripped quite a bit. But this being achieved I was able to get the beast to fire and idle for a minute. It sounded pretty good. At least it sounded better than click, rrr, rrr, rrr. Or worse yet, that klunk - hummmm when the starter doesn't engage. REALLY, short video of the engine running. You may be able to see that the far injector is just dumping gas into the engine. Thank Gawd the throttle plates are tight enough to keep it from all falling in at once. I know a good fuel injection guy out east... So do I. South Bay Fuel Injectors is in the next town over and they do gasoline injectors. We send customers to each other whenever they're looking for the wrong kind of injectors. Looks like I'll be paying them a visit.
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Post by yachtsmanwilly on Dec 3, 2021 7:01:32 GMT -5
At least a little gratification, right? A few years back I was rebuilding a quadrajet and was attempting to pull the butterflies off the shafts, and of course, attempting to unscrew the fasteners, they ALL busted off. DUHHH! They are intended to break. They are staked so they dont get ingested. They are also intended to break by over-tightening, leaving the staked stub exposed enough to grab with vise grips to continue threading out from the back side. Like an asshat, I tried to drill them out and ruined the cross shaft. No biggy, but a lesson learned. Had Cliff Rugles bore and refit new bushings in the base AND fit new plates.
IIRC, arent those TBI's replaced as part of a tune up? ws
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Post by Avenger on Dec 3, 2021 10:45:09 GMT -5
Exactly. It felt good to turn the key, have it light up and idle. I feel a lot more confident that even though the car is going to have some issues at least I can sort out why the pump isn't powering up. I'm going to order the factory service manual. They're pretty cheap and have the diagnostic trees and will tell me where the relay is etc. My only significant concern is the aftermarket alarm system which keeps trying to lock the doors. It may also shut off the fuel pump. We shall see.
I'm not aware of the injectors being a maintenance item. I looked a Rot Auto and you can buy remans, so I might as well go to the place down the road and get them "remanned" there. There's really no rebuilding of these things like we do with diesel injectors. It's flush, ultrasonic clean and test. But I think that will be what they need.
Quadrajets. My favorite carburetor. One of the best pieces of engineering in existence. I have a book about Rochester carburetors by Doug Roe that was very helpful doing the one on the Olds. But I hear that Ruggles is the guru of the Q-jet in particular.
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Post by yachtsmanwilly on Dec 4, 2021 7:16:02 GMT -5
Yeah man! Cliff took care of me and was even nice about it. His wife (Bonney?) did the shipping and was nice as can be too. The whole deal was like 200.00 (shipped) and he gave me 100.00 for the core that was off a Poncho SD 455 4 speed(1972). Thats a rare oddball for the numbers guys. Im sure with OBD's the old fuel will play into it as well. The kid was helping me move a gas air compressor. Just an 8hp Kohler that was put away wet about 14 years ago. No electric start, just a recoil. Gave it a shot of ether and a pull (2) and it fired right off and made 130 psi in a minute. I was impressed! Try to get away from the booze gas. Farm fuel available out there? ws
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Post by bigbill on Dec 4, 2021 9:00:50 GMT -5
check for an inertia switch, if she got bumped around before you got her or during the towing process it may have popped the switch. i would also look into the alarm and maybe a hidden kill switch that someone could have installed
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Post by Avenger on Dec 7, 2021 16:32:51 GMT -5
Try to get away from the booze gas. Farm fuel available out there? ws Yeah, we're pretty much 100% deathanol here on the island. I do pick up an occasional 5 gallon of real gas if I go to the family compound upstate, but that stays in reserve for yard equipment. Other than the standard defects of the stuff it's really not an issue in a larger engine as long as you keep turning it over. It does seem to be rough on the delicate rubber carburetor components of small engines though.
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Post by Avenger on Dec 7, 2021 17:26:39 GMT -5
check for an inertia switch, if she got bumped around before you got her or during the towing process it may have popped the switch. I would also look into the alarm and maybe a hidden kill switch that someone could have installed I need to order the factory manual. I did manage to get a partial schematic from the Corvette forum, and it looks like the pump has a relay that is triggered by the computer when the key is turned on. That cycles for a few seconds to power the pump until the engine develops oil pressure. So my next test is to jump the pump again to get it started and put a test light on the power feed to the pump and see if it lights after startup. If it does then at least I know the circuit has power from the battery. If not, that tells me something too. The alarm system is another mystery. The doors keep trying to lock every time the battery is connected. I don't think that's a feature of the factory system since it doesn't have keyless entry. It's primitive and you actually need to use the key to lock it and unlock it. I can't find any info on the installation of the alarm system. Operation, yes. But how it works and interacts, no. So it's certainly possible that there are hidden switches or some kind of immobilizer as part of that. What's really perplexing is that the thing keeps trying to lock itself even though the alarm module is sitting on my desk. Weird.
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