Hesitation while Cruising, '74 2.0l D-Jet |
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Hesitation while Cruising, '74 2.0l D-Jet |
Nogoodwithusernames |
Jun 14 2021, 04:44 PM
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#1
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Member Group: Members Posts: 239 Joined: 31-May 16 From: Nor-Cal Member No.: 20,051 Region Association: None |
Had the 914 out a couple times this weekend and noticed some hesitation while at light throttle cruising, say at like 25-30mph in 3rd.
I just recently did a valve adjustment and checked timing per the manual, had to clean up the points a little bit as one side had a little bit of a 'tit' starting to grow. Other than the hesitation it seems to be running well still, maybe a bit on the warmer side compared to what it used to be? (Also first time out this summer, ran it a few times this spring when it was nice and cool) But it has good power, and no audible changes in tone. What should I be checking first? Timing looked like it was right on the mark with vac line off and at about 3-3.5k rpm so I don't *think* that's the issue. |
Nogoodwithusernames |
Jun 16 2021, 09:30 AM
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#2
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Member Group: Members Posts: 239 Joined: 31-May 16 From: Nor-Cal Member No.: 20,051 Region Association: None |
The general rule-of-thumb I've been told (Chris Foley) is always keep it above 3000 under load. That follows my anechdotal observations of the effects on CHT. Any time it's a hot day and I'm "lugging it" below 3000 the CHTs get into the high 300s. I really don't like that: http://www.914world.com/bbs2/index.php?sho...mp;#entry377466 Absolutely under load is no question! No disagreement there at all, I was only talking low load scenarios, as that's when my little hesitation issue is popping up. Also, toss a couple drops of oil in the top of the distributor shaft, under the rotor. It lubes the weight pivots. There should be a small piece of filter-like material in there. This a must do as the weights get gummed up and stick without those drops of oil I am pretty sure I did a bit of oil there, but it probably wouldn't hurt to pull it out and clean the whole distributor. It probably needs a new rotor and cap anyways. What's the best source for a good quality cap and rotor these days? I'm not sure I would trust some cheap replacement anymore... I also pulled out the TPS last night, and it was a little dirty but none of the traces are worn. I cleaned it up and I'll put it back in and adjust it once I get my multimeter back. |
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