Car jerks on gear change

[STEVE.M]

With his mate, Pascal.

Wet through, cos he didn`t take his mac.

 

[Flob]

I would say your map reading with engine off is c**k on...

Altitude taken from your 'GPS height' pictured in a previous post.

 

[Louis]

Yeah okay odd! Noticed today just being sat in traffic and putting the clutch down caused revs to bounce slightly. Handbrake on.

 

[Flob]

Im going to vote air leak!

 

[bloke]

Didn't realise you were that high up sorry.

 

[Louis]

Sprayed some brake cleaner around and made no change. Was thinking I'd fucked up the throttle body spraying it somehow but it's been like this a while tbh.

 

[Flob]

Brake cleaner doesn't always work, especially if the leak changes with engine movement (say gear change), butane/propane works a little better than brake cleaner too.

 

[Flob]

Wonder if pushing the clutch in flexes the bulkhead slightly near the brake servo? I would expect pumping the brakes to move idle around quite a bit normally - could give the brake servo vac line a good shake around and see?

Does the TPS give good consistent readings? Cars will use either the tps or the map (or a combination) to determine acceleration enrichment and would certainly (if wrong) cause a jerk when changing gear.

 

[Louis]

Swapping out lambda, top one is the one off the car precat (furthest away from wire brush)

Isn't this wrong? Looks like a generic cheapo lambda.
Bottom is the 'new' one (done like 400 miles off someone on the forum)

 

[flebay]

top one is the one off the car precat (furthest away from wire brush)

Isn't this wrong? Looks like a generic cheapo lambda.

Its not genuine Renault (Bosch)

 

[Louis]

Thought so. Bosch will be going in

 

[Louis]

Replaced the lambda with genuine Bosch and it seems to be graphing better?

Also mapped out the intake

Seems better with the new lambda, going to give it a proper drive tomorrow.