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500 miles on clock, stuttering at 6000rpm+!

Old 12-13-2003, 04:52 PM
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Angry 500 miles on clock, stuttering at 6000rpm+!

Just racked up a steady 500 miles and thought I'd have a few high rev blasts to wet my appetite for a redline frenzy when fully broken in. 2nd gear WOT from approx 3000rpm pulled well, then when just over 6000rpm it hesitated badly for a couple of seconds until I released the accelerator.

Repeated the same thing in 3rd/4th to about 7500rpm and it didn't reoccur, but it didn't seem to rev as cleanly as the demonstrator I gave a good thrashing to in October!

The car was 10 miles plus into a journey, so was fully warmed up!

Dryish road, straight line so no TC cutting in!

I've heard about sticking ports, especially when hitting high revs for the 1st time on a run, could it be this?

Do I need to be concerned?
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Old 12-15-2003, 03:59 AM
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Solution is simple: do this a couple of times more, and observe. If it happens only the first time, it should be the ports.....let your dealer know about this anyway
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Old 12-15-2003, 04:05 AM
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Go to the owners site, bigger thread on this subject.

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Old 12-15-2003, 04:12 PM
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Unhappy

Thanks, I'll try that!

I've had the car back to the dealers and test drove their hi power demo with 2000 miles on the clock. I noticed immeadiately that this car was more willing to rev at the top end.

The dealer then drove my car with a mechanic in the back and they both commented on the lack of top end shove/reviness. whilst out on this run the car also stuttered quite badly while revving past 6k which only stopped by backing of the gas. This also happened, but even worse as I took the car the long way home after visiting the dealers.

It's booked in for a check next Tuesday, and they are ordering some sparkplugs in to replace as a matter of precaution. I will also treat the car to a tank of finest Optimax instead of the usual tesco fuel, to rule out any external influences.

Another strange thing is that the car seems to accelerate harder and rev more cleanly at 3/4 throttle as opposed to WOT.

Confused
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Old 12-16-2003, 05:35 AM
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Problems with the WOT position in rotaries have ALWAYS something to do with the secondary plates (or auxilliary ports)
It was very common for the 5th/6th ports to seize in the 13B NAs......
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Old 12-17-2003, 05:47 AM
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Is this an easy thing to fix?
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Old 12-17-2003, 08:58 AM
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Originally posted by Kenco
Is this an easy thing to fix?
If this is aimed at me and my comment, then yes, unseizing the 5/6th ports was rather easy in the 13B: you just took off the intake plenum, removed the ports (paying some attention to the bolts), then cleaned the whole intake system, put some WD40 and you're done!!
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Old 12-17-2003, 02:40 PM
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Originally posted by Kenco
Thanks, I'll try that!


It's booked in for a check next Tuesday, and they are ordering some sparkplugs in to replace as a matter of precaution. I will also treat the car to a tank of finest Optimax instead of the usual tesco fuel, to rule out any external influences.

make sure you have them replace the plugs with the new hotter ones for the leading plugs. no sense in replacing them with the same ones when there is a newer one out. it's part of a tsb i believe.
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