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[hotel21]

Since getting the vac pipes and multirams sorted at the weekend the car seems to be running a lot sweeter from lowdown revs - that will be the multiram working - but now have two seperate things puzzling a tad.

1) The slightest of flatspots around 3k revs on a light/moderate throttle but not there when applying 'full and firm' acceleration.

2)  I no longer have the same amount of engine braking on the overrun.  The way I have been taught to drive I tend to use this regularly and it took a few miles on the way home to adjust to it!

Are the two linked and is it possible to reduce/rectify or is it simply a matter of readjusting to the 'new' setup?

ta

[tunnie]

sorry can't help with your problems, mate but about the engine braking, i was taught never to do this!

I have always liked driving, and from watching my dad when I was young i picked up his habits. He used to be a biker, and when in a manual went though all the gears, and used engine braking.

When i did this in my BSM lessons I was told off and not to do it! - I was told to brake before a junction, and make one gear change at the junction.

I igrnored him and do engine braking!

[Andy B]

Since getting the vac pipes and multirams sorted at the weekend the car seems to be running a lot sweeter from lowdown revs - that will be the multiram working - but now have two seperate things puzzling a tad.

1) The slightest of flatspots around 3k revs on a light/moderate throttle but not there when applying 'full and firm' acceleration.

2)  I no longer have the same amount of engine braking on the overrun.  The way I have been taught to drive I tend to use this regularly and it took a few miles on the way home to adjust to it!

Are the two linked and is it possible to reduce/rectify or is it simply a matter of readjusting to the 'new' setup?

ta

Don't use light/moderate throttle.      

[Auto Addict]

I would suspect, others will probably rubbish, that the multi rams are still sticking ever so slightly.

This may be the cause of the flat spot and lack of enginge braking.

[hotel21]

Same thoughts as myself, AA.  Apart from the timing, its the only other mechanical thing that was worked on and even then it was only the vac supply to them.

Could be that the multiram valves were previously idle for so long they now stick open rather than slapping shut when not required.  Will monitor for a few days and see what happens but I suspect that 500 plus miles since done should be more than enough.....

[Marks DTM Calib]

Timing we know is good, we checked it and adjusted enough times!

Things that spring to mind....sticking multirams or maybe a small air leak.

[hotel21]

Timing we know is good, we checked it and adjusted enough times!.

No argument from me!    Simply narrowing down the things adjusted/touched  

Things that spring to mind....sticking multirams or maybe a small air leak.

Any way to ensure they free off??  Any sort of strip/clean/lube alternative?  I've had my listening tube out and hear nothing outrageous as regards any air leak.

[Dave-C]

Are the revs dropping to normal tickover after revving the engine or are they sticking then dropping...  just wondering if the main throttle butterflies are not snapping shut properly, allowing ever so slight air past, thus holding the revs on, then settling shut...  they were disturbed somewhat at Newent, maybe crapped up.. also as previously said, air leak...    

Dave C