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View Full Version : 2000 X Star missing/slipping over 3600rpm - Continued from Transmission slipping thrd


jwp1504
03-13-2013, 08:41 PM
I have started a new thread for this issue of mine as i unintentionally jacked the "Transmission Slipping?" thread..

Thanks for your help in advance!!!

Hi Guys,

I have a 2000 X Star that slips/misses as soon as it goes above 3600rpm. I have added videos on youtube to show what the taco is doing.

Am i having the same problem?

At first i thought it may have been dirty fuel, fuel filter or fuel pump??

This video is from idle...

http://www.youtube.com/watch?v=HjUXfXdh09Q

And this one is from 3200rpm up.

http://www.youtube.com/watch?v=lD4WTp9-h7U

Table Rocker
03-13-2013, 09:35 PM
Not that it is a foolproof test, but I am curious if you can get the rpm dip and big knock in neutral.

jwp1504
03-13-2013, 09:40 PM
I tried that. Everything is sweet in neutral...

No dip and no knock..

Table Rocker
03-13-2013, 09:56 PM
That doesn't tell much since there isn't a load, but it's info you need to know.

That knock is huge. Whatever is causing it is going to be obvious in the near term I am afraid. This video is the one where you can really hear it: http://www.youtube.com/watch?v=lD4WTp9-h7U It seems to make it past 4000 rpms okay and start having problems around 4600 or so. It almost sounds like a major detonation issue.

BoulderX45
03-14-2013, 12:12 AM
I bet you've got a spark plug wire or a spark plug problem. I would replace the plugs and then tried again. I have a similar issue with my Malibu that was corrected with plugs.

98 Saleen Cobra
03-14-2013, 12:16 AM
Pull the plugs.. They can tell a lot.. Metallic? Metal? Solonoid gone? etc. That knock def doesn't sound good. Maybe a bad tank of gas etc?

Scot
03-14-2013, 01:51 AM
I mentioned this in the other thread and not sure if you have tried it but I would do a full service on the motor first if you havent already. Wires, cap, plugs, oil, fuel and filter, timing (if you can set it on your motor) not sure what else on your particular motor but I always like to change these things out first anytime I get a symptom I cant diagnose right away and have enough run time on these "throw-away" parts. Rule them out first. My interpretation is that it's a motor issue, not slipping.

A high rev in neutral is way different than under load.

I am a backyard hillbilly type mechanic by night and optometrist by day so I am no authority on the subject so take my advice with a grain of salt. But this symptom can be caused by something as simple as a bad spark plug wire.