Accelerator Issue

Post by **CarlD** » 20 Nov 2006 03:02 pm

Hi all, petavius's other half here. Due to the exhaust deciding to part company with my car Gem has let me use her 340 GLE (Under caution of death if anything happens to it

) to get about. I must admit i am enjoying driving it but one thing which is really annoying is almost like a dead spot on the accelerator. when you put your foot on the pedal to pull away or at low speed there seems to be a delay before the throttle opens up and the revs rise. Any idea what this could be. I belive the cable is adjusted correctly, but then i may be wrong.

Cheers for any help, and i hope you are keeping well.

Carl

Post by **garethreece** » 20 Nov 2006 05:36 pm

Wow gem lent you her car! Mine has the same problem but i have no idea either so im no help!

Post by **A M R** » 20 Nov 2006 05:39 pm

adjust the low speed on the carb. sounds like its running too rich when you put your foot down and not allowing proper combustion - so lack of power.

Post by **petavius** » 20 Nov 2006 08:41 pm

Incidentally I did notice this problem myself and have been mentioning it for a while....men!

Post by **pettaw** » 20 Nov 2006 08:54 pm

Engine details would be good here. 1.4 or 1.7? They can both have different types of problems, but its most probably a worn carby.

Post by **petavius** » 20 Nov 2006 08:57 pm

Its a 1.7, Ad did a stunning job at cleaning the carb a couple of months back but it could be an issue all the same I guess...

Post by **pettaw** » 20 Nov 2006 09:01 pm

Ahh right. Yeah. I would think its most likely a worn or maladjusted carb. Either the float height is incorrect, or the accel pump diaphragm is worn/split. Both will cause a momentary weak mixture on a sharp pull off which will cause a slight hesitation.

Does that sound like what you're describing? I would first of all look at the float height, cos that's more likely to be the cause if its on a gentle pull away, if its on a 'flat to the floor' type of pull away then its more likely its the accell pump, but never say never

Post by **petavius** » 20 Nov 2006 09:04 pm

Yea that sounds like it pretty much, so the carb will be the first point of investigation me thinks!

Post by **classicswede** » 20 Nov 2006 09:04 pm

Gem,

there was me thinking you would reply with -

He's had my car 5 minutes and look what he has gone and done

On a serious note I would suspect fuel mixture here as well.

I doubt the cable as you will feel that through your feet.

Post by **petavius** » 20 Nov 2006 09:05 pm

Hahahahaha - well that phrase did cross my mind....but t'would be too cruel!

I had a cable problem on Samson (1.4 GL) a while back and it doesn't feel the same as that.

Post by **classicswede** » 20 Nov 2006 09:09 pm

Have you made sure the acelerator pump is working?

You can chaeck this by pulling the air filter off and look down the carb (engine off is ok)

Pull the acelerator cable quickly and one of the jets should squirt out petrol.

Post by **petavius** » 20 Nov 2006 09:12 pm

Pretty sure he checked that but I will ask all the same...

Post by **classicswede** » 20 Nov 2006 09:17 pm

From the description of the problem I would put it down to lean fueling.

Over fueling (rich) tend to make the car jerky or kangaroo to a degree.

Post by **petavius** » 20 Nov 2006 09:37 pm

Ahh right, well its not jerky at all so thats a good point...

Post by **CarlD** » 21 Nov 2006 02:33 pm

Right then, my intention is to have a look at the carb tonight. Not having done anything like this, what and how difficult is to check both the float height and the accel pump diaphragm. I guess this involves taking the top off the carb but seeing how its gems car i'm a bit nervous and any sort of guide or what not to do's would be appreaciated.

Cheers for your coments so far

Carl