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| 2 years of torment!; timing issues? | |
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| Tweet Topic Started: May 30 2014, 12:58 PM (5,726 Views) | |
| Hanuman | Jun 3 2014, 02:34 AM Post #61 |
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"The Almighty Grounds Cleaner"
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| Hanuman | Jun 3 2014, 02:35 AM Post #62 |
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"The Almighty Grounds Cleaner"
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i give up........ cant fix the quoting part
Edited by Hanuman, Jun 3 2014, 02:35 AM.
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| nixmixin | Jun 4 2014, 12:36 AM Post #63 |
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Well I haven't been able to apply the advice yet. I should be able to give the sk8 more attention tomorrow afternoon. I will test the o2 sensor. I did check the air temp sensor and the ect sensor yesterday and they checked out ok. I also ordered that replacement part of the distributor yesterday and should have it by the weekend. Thank you again guys for not giving up on me. |
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| evmetro | Jun 4 2014, 01:11 AM Post #64 |
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Hanumans logic looks really solid to me. If you end up needing any of the parts that he listed and my '93 parts are compatible, let me know. The motor is still sitting in the growing pile of gasoline engines with all the original belts and parts still attached. BTW, I don't mess with timing on the 3 phase AC motors, but we do adjust brush timing on the DC ones... |
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| nixmixin | Jun 5 2014, 04:45 PM Post #65 |
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Ok. Tested the o2 sensor out of the car (bench test). Based on how I understood how to test the sensor, it tested as "bad". I also read that the older version (1 wire) o2 sensors don't have a very long lifespan (1-2 years). Mine is over 2 years with excessive miles on it. $25 later and a new o2 sensor is now on the car. :-) It runs about 5% better. Still craps out after warm up. Bought a laser thermometer to see how well my cat was doing. My thought was a plugged cat as a possibility. ... got the car to normal temperature. Shot the inlet of the cat and outlet. ... "bad" cats read a higher temp at the inlet and colder at the outlet. A "good" cat reads the opposite. Mine read as a "bad" cat... here is where it gets tricky.... stock exhaust is around 1.25 inch pipe after the manifold. When I first built the car, I had put an adapter on mine that increased the pipe to 2.5 inches then a flex pipe, followed by a high flow 2.5 inch catalytic converter. Out of the cat, I have a reducer to 2 inch pipe. It is then 2 inch pipe from there on with an old Toyota barrel-style muffler tucked in there too. In other words, lots of "flow". After thinking I had a bad cat, I dropped the exhaust and cut the cat out...I was very surprised to discover that it looked very clean! I can see straight through all the honeycomb and there isn't any signs of failure or clogging. ???? I expected to see gunk and blockage? Anyways, I don't have $250 for the stock, CA legal cat so as a band aid for now, I am straight piping the cat until I get all these bugs worked out. The replacement part for the distributor comes in tomorrow. I will update after I swap it out. |
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| nixmixin | Jun 5 2014, 07:29 PM Post #66 |
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So, finished straight piping the cat for now. Still Boggs after warm up. Good pressure from the tailpipe so I don't think the muffler is plugged up somehow. Hoping for new progress after the distributor part is swapped out.... |
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| evmetro | Jun 5 2014, 08:19 PM Post #67 |
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If you want, I can look around my shop and see if I can round up the cat from my 93... I am not sure what kind of shape it's in, but if it gets your car fixed, you can have it. |
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| nixmixin | Jun 5 2014, 08:27 PM Post #68 |
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that would be cool. But at this point, I am just trying to solve the problem. Having no cat wont hurt anything temporarily and wont effect it negatively either. So, it is 1 more thing on the "it isn't this" list.. |
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| Coyote X | Jun 5 2014, 08:56 PM Post #69 |
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When you get the car warm and it starts missing don't forget to dump a cup of water over the base of the distributor to cool it down and see if it clears up. A cat will always get very hot if the car is missing, it is burning off the excess fuel. |
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| Johnny Mullet | Jun 5 2014, 09:26 PM Post #70 |
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Fear the Mullet
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Seems like symptoms of a clogged exhaust/cat to me, but you said bypassing the cat made no difference? If the cat was full of crap, so is the resonator and muffler. Just a thought. |
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| nixmixin | Jun 5 2014, 11:47 PM Post #71 |
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I completely agree with you. It even has that deep thoaty sound. I will strait-pipe the muffler too in the next day or 2. I do small mechanic side jobs every now and then. I have a few lined up over the next 4 days. If I find time to knock out the muffler, I will. I can feel victory coming soon with this whole issue. I just gotta stay persistent. I will post updates as I get them.
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| David95237 | Jun 5 2014, 11:49 PM Post #72 |
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You can take the o2 sensor out and install a pressue gauge. to check for restrictions in the exhaust.
Edited by David95237, Jun 5 2014, 11:50 PM.
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| nixmixin | Jun 5 2014, 11:50 PM Post #73 |
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the cat was totally clear, by the way. I don't have a resonator. The muffler is still a strong suspect....The muffler was out of one of my old Toyota pickups. It was a 1980. Yikes...34 year old muffler.... hmmm... |
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| BillMan | Jun 6 2014, 02:54 PM Post #74 |
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Elite Member
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A fix ever come about this? |
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| nixmixin | Jun 7 2014, 09:54 PM Post #75 |
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nope. Here's a quick recap of my recent theories and attempts to solve it: I installed the distributor pickup coil that had a bad wire inside the distributor, as well as a new rotor and distributor cap. Then I strait piped the entire exhaust with 2 inch pipe. No cat or muffler as a possibility. .... Same result. -High/smooth idle -Runs amazing until it is warmed up. -Dropped from high 40's MPG to mid 30's -After the engine warms up, Boggs/floods/tried to die while under load unless at WOT. -I left the timing light hooked up to see if the ignition cut off while the bogging happened, The rhythm didn't change or stop during the bogging. -Still unable to get the timing to an adjustable range with the timing belt in place with the crank and cam sprocket in their marked position. -I did the double check of the TDC on the #1 cylinder by removing the sparkplug and sliding a pencil in the hole and determining the TDC... it was exactly where the marking lined up on timing cover gasket. -Brand new o2 sensor, distributor cap, rotor, distributor pickup coil, vacuum lines. -Fresh top-end rebuild with Throttle body, intake manifold and EGR system completely cleaned and cleared out. EGR valve in perfect functioning/working condition. Is there an equivalent way of double checking "TDC" of the cam sprocket? Is there another video or picture or test/re-test that I can take to help diagnose this? Here is a 30 second video to show the symptoms. Notice the bog/delay when I stab the gas vs no bog when I slowly give it gas/no load.... https://www.youtube.com/watch?v=XFnOyerhjCE&feature=youtu.be |
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3:50 AM Jul 11