Weird flatspot at 4600rpm, can't 'break through' it in 4th |
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Weird flatspot at 4600rpm, can't 'break through' it in 4th |
nebreitling |
Aug 7 2003, 07:11 PM
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#1
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
hi all
i've discovered a weird ignition/fuel system quirk in my '75 2.0, which has probably been going on since i've owned it (3 months) -- just haven't noticed it. the engine has a flatspot at ~4600rpm -- it feels like the fuel cuts in and out to keep the engine below this speed. now, i can 'break through' it in 1st --> 3rd gear, it just pauses and stumbles a bit at 4600, then moves merrily along toward redline. but in 4th (and 5th, i presume), it feels like i don't have enough power/momentum to 'break through it'. 2 months ago, car had a full tune up, valves adjusted, etc. airpump removed, air injector jets plugged. aside from this quirk, it runs smoothly and strong. does anyone have suggestions for things to check? (IMG:style_emoticons/default/confused24.gif) nathan |
Qarl |
Aug 7 2003, 08:00 PM
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#2
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Shriveled member Group: Benefactors Posts: 5,233 Joined: 8-February 03 From: Florida Member No.: 271 Region Association: None |
I second the throttle position sensor. Remove the throttle body, remove the cover off of the TPS and clean out all the gunk out inside. If there isn't major wear (grooves in the contacts) then it might work better once clean... of not, then replace.
Cleaning out tons of gooped up oil helped my '74 1.8L run better! Karl |
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