05-02-16, 10:18 PM
:agree
If it clears above 3000 revs I would as frosties said check the pilots jets as they could be partially blocked especially on carbs 3 & 4 and the the number of turns on the pilot screw, for the 98 to 01 it should be 2 turns out. The pilot jets have a star web inside which is easily blocked and not easily cleared.
I found that putting them into good quality cellulose paint thinners for an hour and blowing then through with an air hose usually does the trick, but if not repeat the process.
On a few occasions I have had to resort a thin brass brush bristle to poke them out. Brass on Brass jets does not damage them.
If you have a lazer heat detector aim it at the pipes to give you a good indication of which cylinders have the problem as they will be cooler than the rest.
Check the resistance of the leads from plug cap to plug cap and they should be around 20Kohms they should not really be more than 20% difference in Resistance between the 2 &3 pairing and the 1 & 4 pairing. over 24Kohms will cause problems.
If there are large discrepancies, check the individual caps
If it clears above 3000 revs I would as frosties said check the pilots jets as they could be partially blocked especially on carbs 3 & 4 and the the number of turns on the pilot screw, for the 98 to 01 it should be 2 turns out. The pilot jets have a star web inside which is easily blocked and not easily cleared.
I found that putting them into good quality cellulose paint thinners for an hour and blowing then through with an air hose usually does the trick, but if not repeat the process.
On a few occasions I have had to resort a thin brass brush bristle to poke them out. Brass on Brass jets does not damage them.
If you have a lazer heat detector aim it at the pipes to give you a good indication of which cylinders have the problem as they will be cooler than the rest.
Check the resistance of the leads from plug cap to plug cap and they should be around 20Kohms they should not really be more than 20% difference in Resistance between the 2 &3 pairing and the 1 & 4 pairing. over 24Kohms will cause problems.
If there are large discrepancies, check the individual caps