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YOUR RESEARCHAcceleration - Hiccup
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Replace )
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Suggestion · Original poster
Doesn't feel like clutch slipping (the RPM doesn't change).
Leading evidence: 'Replace )' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace )' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
In replacing the alternator, the arm with the bushing broke...the bushing was very difficult to move, and I hit it with some PB blaster, but apparently it was stuck enough that trying to pull it back in when re-installing was enough.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
In replacing the alternator, the arm with the bushing broke...the bushing was very difficult to move, and I hit it with some PB blaster, but apparently it was stuck enough that trying to pull it back in when re-installing was enough.
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Rennlist: 1 discussions
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Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I am having this issue where there is a "hiccup" when WOT, but only at highway speed. Seems not to happen in 1st or 2nd gear. When accelerating on the highway in 3rd/4th (maybe 5th but speeds are already frightfully illegal in 4th) I get a momentary jerk with no acceleration. Lasts for 1/2 second maybe?
Doesn't feel like clutch slipping (the RPM doesn't change). Fuel? Air? Spark?
Car has new (within last 5000km) coils, MAF. Within last 10,000 km new injectors, clutch and flywheel.
2002 4S with ~100,000 miles on it (163,000 km). Otherwise drives fine. No pending codes, good power, etc.
Any ideas where to start? Measurements to take?
U probably need to find someone to "log" the event with a durametric or advanced scan tool. Basically pick a half dozen perameters and graph them while trying to recreate the issue. I would start with misfire or knock, maf, tps, crank signal.
Also u may want to hook a fuel guage up with an extended hose so u can read it while driving to make sure its not a pump issue
U should see a line that says "actual cam value" or similar. On my Autel scanner its right under the cam deviation. It will jump at or around 4k rpm (not sure the actual value) should go up around 30*, this is when the variocam kicks in.
So...I am pretty sure that it was the result of a broken vacuum line in the plenum flap system. So I went in and fixed that. Test drive seemed to confirm it. Pulled like I have never remembered.
However,
In replacing the alternator, the arm with the bushing broke...the bushing was very difficult to move, and I hit it with some PB blaster, but apparently it was stuck enough that trying to pull it back in when re-installing was enough.
I have another alternator on order. Is there a trick to installing it without trashing it?
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