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Old 08-17-2013, 01:13 AM   #1
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Rough runner

Car ran great for a long while and then all of the sudden ticking came up and wouldn't go away. I lost a ton of power too so now my car shakes and stumbles. I found that my exhaust manifold was loose so I hoped that was the problem. Tightening seemed to stop the tick but still shaky.

---------- Post added at 01:13 AM ---------- Previous post was at 01:10 AM ----------

Then my coil went out on me so I replaced that. Now I figure it's my carb being bad. Made sure my float is good. The car only runs on rich. Timing isn't a problem. I have a solid valve adjustment. Soooo is it my power valve? If it is I need to know everything about power valves.
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Old 08-17-2013, 07:37 AM   #2
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I had an '83 GT with the Holley/Motorcraft 4V that went through power valves frequently. Your description sounds similar. The main thing to know is buy them in bulk! Seriously though, can't remember if there were different sizes etc. Haven't had a 4V since 1999 though, so I will defer the real answer to someone who knows.
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Old 08-17-2013, 09:59 AM   #3
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Haha thanks. I want to know if I need to get them from Holley site or local auto store and what size.
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Old 08-17-2013, 09:25 PM   #4
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You can get them locally. Holley website, or Jegs or Summit, might have advice/details. I always used the stock replacement. I think the critical measurement on a power valve tells when it "comes on" for lack of a better term. I'll look for a link.
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Old 08-17-2013, 09:51 PM   #5
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Yea I got a holley rebuild kit put in new meter block gaskets, needle and seat, power valve, and acc. pump diaphram. The pump is smaller for some reason so I had to adjust the arm. Still, no luck. I thought I did a thorough job on the small rebuild. I guess I'll look for a better fitting carb.
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Old 08-18-2013, 07:38 PM   #6
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Got oil on my spark plugs
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Old 08-18-2013, 11:45 PM   #7
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Quote:
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Got oil on my spark plugs
Have you checked compression on all cylinders?
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Old 08-19-2013, 06:41 AM   #8
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Okay it's more like unburned fuel
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Old 08-19-2013, 04:19 PM   #9
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I only checked compression with my finger. And I want to check the exhaust manifold to see if any holes are cold but the car runs at random times. My gas is flowing out of the carb overflow hole although I just checked my float. I don't think it's sticking
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Old 08-19-2013, 08:12 PM   #10
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Okay it's more like unburned fuel
Are you sure you're getting good spark if your timing is correct as you stated. Check rotor and cap for cracks. Check plug wires.
Fuel wet plugs is spark or timing problem. Are all the plugs wet?
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Old 08-19-2013, 11:01 PM   #11
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All are wet. Ill check the timing.
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Old 08-25-2013, 07:04 PM   #12
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I replaced my holley 600 with an autolite 2100. There isn't a difference in the way my car runs (big loss of power, hesitation, shaky at idle and drive). The replacement was needed though. Now I can assume its a vacuum leak. I replaced my pcv and hose they looked pretty bad. What next?
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Old 08-26-2013, 03:13 AM   #13
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I use propane to find a leak my auto teacher showed me you get a little bottle of propane and a valve and hose. You hook it all up and open the valve a little but not wide open and then you just follow the lines around until the engine revs up a little because the propane gets sucked in from the leak they are other substance you can use but this way you don't have to spay stuff all over your engine
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Old 08-30-2013, 12:56 AM   #14
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Thanks Travis luckily I didn't have to do that because I found a big oil leak at the back of my intake. The gasket had sucked out of place into the top end leaving a good sized gap I can imagine. Replacing my gaskets should be simple and effective along with replacing my trans hose and a couple other minor flaws along the firewall. I was hesitant to start taking the motor apart but I should have acted sooner.
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Old 08-30-2013, 01:15 AM   #15
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No problem glad you got it figured out !
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