Engine Problem

[mattd1984]

Hi guys wonder if anyone has any ideas about the problem im having. When you drive along at about 30 it 4th so your just cruising with only a bit of throttle you get this jerky feeling. Same happens with your in 3rd doing about 25ish. Its from the engine best i can describe is its lumpy kind of jumping a bit. (not a great discription).
The guy who works on my van said could be the dissy and to change it for a 009 but hearing interesting things about the 009. Im running single carb stock setup.

Cheers for you help

Matt

 

[Bookwus]

Hiya Matt,

Allow me to answer your question with a question....................

Are you also having a problem with the idle? For example, when you slow down to stop for a traffic light are you having any problems with the engine cutting out or dieing?

 

[mattd1984]

Hiya Matt,

Allow me to answer your question with a question....................

Are you also having a problem with the idle? For example, when you slow down to stop for a traffic light are you having any problems with the engine cutting out or dieing?

No it was doing that before it went and had a load of work done to the engine. Thats all sorted now just this last problem.
Cheers

 

[oneday!]

do you mean when you hold the throttle at certain revs

 

[mattd1984]

Yer it's fine when your giving it a bit of gas but when you back off and are just cruising a low revs say 35mph in 4th so im only using a bit of throtle thats when it happens.

 

[pete nice]

Start at the valve clearances from cold, then do points gap & check timing.

 

[aogrady]

Hi!

Could also be worn throttle shaft on the carb, sucking air past. Give the shaft a good wiggle and see how much play there is. There is a sticky in tech about changing the bushes, and also look at the thread titled "flat spot"

Certainly as Pete mentioned, points, ignition timing and valve clearances - always a good idea to make sure they are spot on, especially if it's been a while since they were checked - i need to check my valve gaps too.....

Alistair

 

[mattd1984]

I had the value clearences done yesterday and all the timing was done about 2 weeks ago. Could it be a dirty carb? Is it worth changing to a 009 dissy as hearing not great things about them?

 

[Loxy]

I had the value clearences done yesterday and all the timing was done about 2 weeks ago. Could it be a dirty carb? Is it worth changing to a 009 dissy as hearing not great things about them?

What reason did the guy give for replacing your existing distributor?

 

[mattd1984]

He said the old style vacuum ones arn't as good as the new 009's. He thort this night cure the problem. Also the dissy cap is a bit cracked so that needs doing anyway. Cheers