Throttle bodies with a misfire/hesitation - Engines Forum - Peugeot 306 GTi-6 & Rallye Owners Club

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Subject: Throttle bodies with a misfire/hesitation

gti6boy

Newbie

Location: bexley

Registered: 19 Feb 2007

Posts: 20

Status: Offline

Post #1

I built the car about 2 years ago with brand new bodies and it's driven faultless the whole time

A couple of days ago the car started to misfire slightly at low revs and spit flames out the bodies. I had exactly the same problem on the 205 cabriolet but I can't remember how I fixed it.

I have tried 3 coil packs, plugs and water temp sensor. The only other thing I think it could be is the tps but this was also new

Here is a video
http://i147.photobucket.com/albums/r295/gti6boy/45e54cd9.mp4

Thanks

Posted 25th Feb 2012 at 21:23

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cjm_harris

Seasoned Pro

Location: Parts for Sale section

Registered: 04 Dec 2007

Posts: 7,442

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Post #2

Crank sensor or coolant temp sensor? Ie thinking engine is cold so running rich?

Edit: noticed you have tried that Doh

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Posted 25th Feb 2012 at 21:28

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gti6boy

Newbie

Location: bexley

Registered: 19 Feb 2007

Posts: 20

Status: Offline

Post #3

Did the video work?

Think it's running a bit rich yes

Same symptom hot or cold

Posted 25th Feb 2012 at 21:40

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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

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Post #4

Dan's one did similar, it as the engine block buggered leaking coolant, HG would give similar symptoms.

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Posted 25th Feb 2012 at 23:17

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phillipm

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Location: Rotherham

Registered: 15 Oct 2006

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Post #5

Is it mapped off the TPS?

If it's worn slightly the setting can drift and the massive ignition advance under light loads and openings will make it fire back up the inlet.

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Posted 26th Feb 2012 at 01:29

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gti6girl

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Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

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Post #6

Welshpug, would a compression test, test this?

Phillipm, not quite sure what you mean? Tps was set a percentage then the car mapped on the road

Posted 26th Feb 2012 at 01:39

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phillipm

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Location: Rotherham

Registered: 15 Oct 2006

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Post #7

Is the car purely mapped from the TPS sensor though, or does it use the MAP too?

MAP too should correct slightly for TPS drift, whereas if it's just from the TPS it could well be that..

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Posted 26th Feb 2012 at 01:44

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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #8

Moved to engines. Smile

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Posted 26th Feb 2012 at 07:24

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gti6girl

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Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

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Post #9

Thanks stan, it would not let me post in engines

I belive if the tps go's a couple of percent out it runs funny so it could be that

Posted 26th Feb 2012 at 09:23

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gti6girl

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Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

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Post #10

Cars been sat over night. Fired up and run sweet for 20 sec then started to miss fire.

Then something strange happened, the fuel hose from the pressure regulator to fuel hose started leaking?

Could this be fuel related?

Posted 26th Feb 2012 at 11:04

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gti6girl

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Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

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Post #11

Just took it out for a spin. Foot flat to the floor in 3rd and it pulls round to 4k then splutters but pulls through it. Does not do it every time

Posted 26th Feb 2012 at 12:29

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mabgti

NV motors

Location: Bham tunnel @7400rpm

Registered: 28 Aug 2003

Posts: 9,127

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Post #12

Sounds like your timings out.. Or your injectos are on their way out.. What fpr and injectors is it rinning?

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Posted 26th Feb 2012 at 12:30

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gti6girl

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Location: Dartford

Registered: 19 Feb 2007

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Post #13

Fpr is one of them adjustable jobbies but was never new
Injectors are standard

Posted 26th Feb 2012 at 12:56

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mabgti

NV motors

Location: Bham tunnel @7400rpm

Registered: 28 Aug 2003

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Post #14

Why has it been mapped on a rising rate fpr? This could be your problem.. Utilise the oe 3bar and check

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Posted 26th Feb 2012 at 13:37

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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

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Post #15

yup, ditch the adjustable fpr, pain in the ass they are.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 26th Feb 2012 at 15:21

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gti6girl

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Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

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Post #16

As I said never had a problem with any of my cars running with this item. I can't put a 3 bar on there as it's been mapped to this one and I don't have access to a mapper any more or parts so trying to fix just whats broken.

Posted 26th Feb 2012 at 16:52

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matty_rallye

Senior User

Location: Devizes

Registered: 28 Oct 2005

Posts: 966

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Post #17

I had a similar problem with mine a year of so back. With the DTA management it requires an air temp sensor which on mine is mounted just infront of the inlet. The sensor failed and caused it to miss up to about 4k rpm and then it would pull past it.

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Posted 26th Feb 2012 at 17:20

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gti6girl

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Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

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Post #18

Popped the car over to track and road and there was a spike on the map

The battery packed up last week so could have been from that

Posted 1st Mar 2012 at 23:04

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