Time to rebuild DRLA's? |
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Time to rebuild DRLA's? |
era vulgaris |
Mar 10 2016, 05:52 PM
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#1
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J is for Genius Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
This is a continuation from another thread, but to summarize my car very suddenly started driving like crap yesterday. In the middle of a drive it started popping and sputtering, and became pretty much undriveable. AFR was suddenly in the high teens.
At first I thought it was to do with fuel delivery. That turned out not to be the case. What I noticed today after I managed to get it to actually idle is that during warm up, cylinders 1 and 2 seem to be acting normal. But 3 and 4 heat up extremely quickly, and heat up past their normal idle temps and would probably continue to heat up well into the danger zone if I let them. I'm running DRLA 40's, and I'm still getting to know these carbs. The idle jets are clean. All I can think is that there's possibly a vacuum leak, maybe a seal or gasket failed suddenly while I was driving. They were rebuilt about 5 years ago though. Time for a rebuild? Anyone who knows Dells well know of anything I should check before I start tearing them apart? And does the rebuild kit from CB include everything I'll need? |
era vulgaris |
Mar 11 2016, 08:41 AM
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#2
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J is for Genius Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
Oh man, I hadn't even considered that possibility. Now im a little worried. I haven't done a compression test since I owned a TR6 years ago. Remind me again....engine hot or cold? All plugs pulled, or just the cylinder being tested?
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JOEPROPER |
Mar 11 2016, 10:17 AM
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#3
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The answer is "no" unless you ask... Group: Members Posts: 1,184 Joined: 21-November 15 From: White Plains New York Member No.: 19,387 Region Association: North East States |
Oh man, I hadn't even considered that possibility. Now im a little worried. I haven't done a compression test since I owned a TR6 years ago. Remind me again....engine hot or cold? All plugs pulled, or just the cylinder being tested? Remove all plugs, disconnect ignition and fuel source. throttle wide open, connect compression tester and crank engine. You want 4 good puffs at each cylinder. If you have equal compression around 90psi, then you are good. First puff should be around half of final. Slightly low, add a drop or 2 of oil and retest. Very low or 0 suspect mechanical damage ie valve train, piston/ring catastrophic failure. remember, exhaust and/or intake restriction could and would have an effect. You can also do a running compression test, but with the description given, you probably won't have to. Remember to record all findings. Compression test is easy! Do the easy stuff first! Good luck! Joe |
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