Diagnosing help - rev dropping

chillefc99GTI

Guest
honestly i dont know but it worked. so that will do me . de pressurises the fuel system so gets rid of any blockage or trapped air i suppose.
 

Smithy

Old School
Jan 17, 2002
965
0
Hertfordshire
maybe the reason when I fitted my fuel pump relay, it seemed to cure the problem, went for a lot of miles without stuttering.

Mine hasn't had a stutter for a while now though. :shrug:
 

f17th

was a 1999 2.0 8v gti
Aug 13, 2006
49
0
West Sussex
Hiya,

I just brought a 1999 GTi 2.0L 8v Cupra sport
and i seem to be having the same problems as you guys,

I took my girlfriends parents up to gatwick the other day and the car just lost all the revs for a split second while doing 70 down the motorway and then picked back up, It did it a couple more times on the way there and also while i was driving home on my own,

Has anyone found what the problem is ?

Also looks as if it may be worth starting with the cheap fix's first so looking at cleaning the throttle body, and getting a ECU control relay and a Fuel Relay,
Can anyone tell me where they are ? Maybe even a pic or two as this would help loads.

Do you think it would be worth replacing the fuel filter as well ? And would you go for a SEAT part ?
 

Smithy

Old School
Jan 17, 2002
965
0
Hertfordshire
Hey, I'm hopefully gona get a couple of cheap bits looked at this week. So far the list of replacements / cleaning is:

Throttle body cleaned
ECU Control Relay replaced
Ignition Coil replaced
Cranked car over without Relay to clear air outa fuel system?!? (worth a try)

Fuel Speed Sensor / Crank Speed Sender (whatever you want to call it) - this week
Fuel Filter - this week possibly



I'll take a few pics as I go and upload it all somewhere useful. I'm on hol nx week, so is likely to happen just after that.

Kinda glad its not relay or coil, as they tend to pack up altogether, if it's fuel filter, rota arm or speed sensor, they seem to remain intermitent for a lot longer by the sounds of what I've read previously. So hopefully my motor won't conk out altogether somewhere nasty.
 

f17th

was a 1999 2.0 8v gti
Aug 13, 2006
49
0
West Sussex
Hi,

Went down to the local SEAT garage today to get the,
1, Fuel Relay
2, ECU Relay
3, Fuel Filter


They were asking for the model / part numbers for these bits, Could I ask someone to give me the part numbers if they have them at hand.


Thank you
 

f17th

was a 1999 2.0 8v gti
Aug 13, 2006
49
0
West Sussex
No, I was waiting for some kind person to post up the part numbers for the bits i need from SEAT, Seeing as there pretty unhelpfull and didnt know what relay i was asking for.
 

Smithy

Old School
Jan 17, 2002
965
0
Hertfordshire
Hi,

Went down to the local SEAT garage today to get the,
1, Fuel Relay
2, ECU Relay
3, Fuel Filter


They were asking for the model / part numbers for these bits, Could I ask someone to give me the part numbers if they have them at hand.


Thank you


They have ETKA, software which should spoon feed the staff in finding your parts. I've not had trouble with the SEAT Cheshunt bloke who's a nice helpful chap. I've just ordered a window mech passenger side, all I gave him was my reg, don't see why it should be different elsewhere.

Try GSF for the fuel filter, probably cheaper. Before u ask as there seems some initiative lacking, http://www.gsfcarparts.com/ ;)

All my car work scheduled for this weekend finally!
 
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rocket_ronnie

Active Member
Aug 10, 2006
223
0
Banbury, Oxfordshire
hey guys, unfortunatly my car is playing up aswell but i'm not sure if its the same as u guys, basicaly it sounds like it misfires wen i'm on full throttle but wen i drive normally its pretty much ok...how hard is it to clean the throttle body coz it sounds like alot of work? :confused:
 

f17th

was a 1999 2.0 8v gti
Aug 13, 2006
49
0
West Sussex
Your problem sounds like your having issues with Detonation in the fuel, the fuel is being ignited before its in the cylinder.??

Am i right in thinking this ?

Well my problem hasnt come back after doing a good 250 miles this weekend round the New forest and that.
 

Smithy

Old School
Jan 17, 2002
965
0
Hertfordshire
Didn't have the right bits to get the crank speed sensor sorted this weekend, need to remove the engine mount to get to it, which means using the workshop this coming Saturday. Just want it sorted now.

Got the elect window sorted, £100ish from Stealership, but comes with all the bits, motor, nuts etc. I know the VW Polo suffers the same, but the same part was £130 and didn't even include a motor ....poor mate having same probs.

Worth replacing the whole lot, as a snapped cable is often a sign the motor is on the way out.
 

f17th

was a 1999 2.0 8v gti
Aug 13, 2006
49
0
West Sussex
My issue seems to have dissapeared,
I didnt get round to replacing any of the parts so maybe it was just having a funny 5 minutes,

The only thing i can put it down to was the fact when i brought the car the acceleraotor peddle was nearly touching the floor, Thus not being able to open the butterfly on the throttlebody very much and when i put a circlip in to hold the cable there may have been some dirt in the throttle body.

Im pretty sure the throttle peddle had been like that for a fair few years since my mate owned it anyhow,
 

Smithy

Old School
Jan 17, 2002
965
0
Hertfordshire
Got a local garage in the end to fit the sensor for me, 1 - 1.5hr labour.

I've waited at least 100 miles of testing to post the results, which are very promising. Car hasn't hesitated once since having it fitted, and actually feels a little smoother than before, especially from cold. Seemed ever so slightly lumpy on gentle acceleration previously when cold. 3rd & 4th especially, changing at 2.5 - 3k revs.

Got some good mpg recently too. Not sure whether this is just because of fresher weather and better responsiveness, but I'm happy which is the main thing.

Should have stuttered by now, was doing so on average once every journey. Seems like 3rd time lucky, after coil and fuel relay, speed sensor has fixed my prob. Cheers for the info, was mentioned that it was probably coil / speed sensor from the beginning of this thread anyway, but thought I'd do the easy / cheaper bits first, which seem to go completely after a while of being tempremental, where as the speed sensor just stays intermitent from what I've read anyway.

FIXED, ta all.
 

wonderpupp

Guest
I need to change the ECU relay, but I don't know where it is? I got a replacement Relay for £11 - thanks to all help on here. but I can't find the original to replace it. Is it in the little black box near the windscreen drivers side?
 

wonderpupp

Guest
See, no wonder I was stuck, I was looking under the bonnet!!

I'll stick to bikes. Not big enough to lose parts on.

Thanks.
 

s2pyd

Guest
wow

I've been reading this thread with massive interest, so today I thought i'll get some parts priced up .. So I phone a local Seat dealership near Manchester, and I was shocked at the prices they where quoting me.. :-o

Fuel relay (Between £30 and £40 but they would need to see the relay)

Ecu control relay ( "" "" "" "" )

Spark leads 19.81 per lead plus vat

Dizzy cap £13 .64 plus vat

Ign coil £82.25 plus vat

Fuel filter £10.53 plus vat

Now, I work for mercedes parts dept and thought the prices where a P*** take ..!!


I think i'll be using gsf from now on..

I've been advised from this thread and others to try VW so that's next..


Thanks

Luke
 
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