Car jolting when I give it some throttle

[abhardwaj1990]

Afternoon all, not posted in the good ol' mk2 section in a while........

Right I have a small problem, hopefully an easy fix.

First occurred a few weeks ago but has got worse, I was on the motorway cruising at 65-70, went to overtake, so put my foot down and the car jolted a bit, revs dropped slightly and speed dropped to about 60mph..............whereas if I gently apply the throttle it doesn't do this.

Only seems to occur when in 5th and I apply the throttle..........

After a bit of searching, I'm guessing I would need to clean out the throttle body? I thought that would have been done on my last major service which was in the summer, I've not done that much mileage since........But I will clean it out again during this week when I get chance......

If it isn't that does anyone know what else it could be?

Cheers in advance

 

[kyle18uk]

I'd put my money on it being the distributer cap and rotor arm.

 

[Kai_1600]

I'd clean the TB and if not the above check the coil with a spare if you've got a mate with a Mk2 you can swap it with (5 min job if you've got little fingers to get down the back of the guttering type stuff)

 

[critch4]

I had this problem in my old 1litre mk2, except it was really bad in all gears especially when it was wet, like a really bad misfire when you put your foot down. it was my dizzy cap and rotor arm, they were nakered so the spark was jumping between the cylinders randomly.

 

[abhardwaj1990]

Thanks for the replies,

A few others have also said that it could be the Distributor cap and rotor arm.......how would I go about checking these?
Any diagrams?

Thanks

 

[Kai_1600]

dizzy cap will be held on with 2 metal clips that you'll probably need a screwdriver to pop off - the rota arm is inside the dizzy cap.
Just make sure its not broken, wet or covered in shite - there'll be a little carbon rod in the middle that needs not to be broken as well.

If its wet give it a wipe and bit of wd40 won't do it much harm

I think

 

[GTV]

also check the fuel filter, had this before.

 

[Krishen]

also check the fuel filter, had this before.

Could the fuel filter being clogged cause idle issues?

 

[Cupra Kid]

Could be:

* weak fuel pump not meeting demand
* Distributor cap and arm - check and put Vaseline on, mad as it sounds it helps!!
* Blocked fuel filter
* Throttle body
* Drive train issue - I'd leave this one til last.

 

[Krishen]

Could be:

* weak fuel pump not meeting demand
* Distributor cap and arm - check and put Vaseline on, mad as it sounds it helps!

Where do you put the vaseline? (No funny answers thank you

 

[Cupra Kid]

Where do you put the vaseline? (No funny answers thank you

on the rotor arm, helps with the connection learnt it off a friend who puts grumpy old fords back together

 

[suj]

on the rotor arm, helps with the connection learnt it off a friend who puts grumpy old fords back together

he's right! and stops water on the rotor arm too

 

[Krishen]

on the rotor arm, helps with the connection learnt it off a friend who puts grumpy old fords back together

I assume you mean on the end of the rotar arm, the bit that 'connects' to the points in the dizzy cap?

 

[abhardwaj1990]

Well boys, i check the dizzy cap and rotor arm seemed fine, cleaned out the throttle body, and was running fine till tonight, the "jerking" got really bad, even when not giving that much power,

Then engine cut out on the way home on a dual carriageway (a52) at about 10.00 tonight .....it wouldn't start again, called the RAC (who were great, got there in 20 mins). The engineer checked the distributor cap and rotor arm first, seemed fine, then throttle body, also fine but car still cutting out......

In the end he couldn't figure it out, was either that a breather pipe may have come loose, letting air in, but he couldn't see it or not enough fuel reaching the engine (fuel pump).....so had to be towed home

Has been dropped of at my parents mates garage so he will have a look tomorrow

 

[Kai_1600]

That REALLY sounds like your coil has been on the way out for a while and has finally died.

TBH i would have expected the RAC bloke to have a spare coil in the van and to have tried it

 

[Cupra Kid]

for it to do that i'd say its the coil too.

 

[abhardwaj1990]

Took it to my mechanic, he's had a look, cleaned it all out, checked the coil, scanned it, reset the ecu etc etc, seemed fine starting running fine but it started jolting again.

He said he will take a look again and that its most likely the throttle body, definitly nothing to do with the ignition/electrical side of things ..................and I know they're not cheap to replace

 

[abhardwaj1990]

Actually, found this:

http://cgi.ebay.co.uk/1997-seat-ibiza-1-0-throttle-body_W0QQitemZ280421394623QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item414a6ae8bf#ht_500wt_1182

would this fit? It's off a 1.0, mines a 1.4.......

 

[Fl@pper]

tried on a 97 to see whats what

030 133 064D
is the number for the AEX 1.4 + AER/AEE/AKV/ALM/APQ/ANX (>>> 6K-X-015000)

030 133 064F
is the number for AER/AEE/AKV/ALM/APQ/ANX ( 6K-X-015000 >>> )


looks hopeful but depends on engine code and chassis number (change is build 05/98) but to be honest you won't beat checking for numbers on either of them to be sure mind

 

[abhardwaj1990]

Thanks for that flapper, my car is the 96 model, 1.4 CLS,

I can find out the chassis and engine codes to be sure....