WikiWirral its great, register, enjoy and welcome.
Forum Statistics
Forums65
Topics76,352
Posts1,033,280
Members14,560
Most Online16,551
Feb 2nd, 2024
Who's Online Now
12 members (ArranGirl13, 3 invisible), 7,879 guests, and 427 robots.
Key: Admin, Global Mod, Mod
Top Posters
sunnyside 45,164
MattLFC 22,315
Mark 21,269
granny 17,788
_Ste_ 16,345
Newest Members
Kalena1962, rattus, Lisrush, Emotecreative, ArranGirl13
14,560 Registered Users
New General Forums
New Wirral History
Tall Brick Chimneys
by diggingdeeper - 16th Mar 2024 11:56am
D.I.Y. / Building Shop
by mharford91 - 3rd Mar 2024 8:53pm
1970's Murder in Central Park, Wallasey
by cutespam - 4th Aug 2018 10:28am
Old Hall in Higher Bebington
by Rhoobarb - 25th May 2010 5:55pm
Oleo Works
by Ducko - 14th May 2008 3:09pm
Top Posters(30 Days)
granny 14
casper 13
bri445 4
Topic Replies
Facial recognition coming in supermarkets?
by diggingdeeper - 27th Mar 2024 3:50pm
Bolts at Bebington Road
by diggingdeeper - 27th Mar 2024 2:33am
Hot Spot Chippie Broadway
by Excoriator - 26th Mar 2024 7:57pm
Tall Brick Chimneys
by diggingdeeper - 26th Mar 2024 5:43pm
Lost river (Well, brook really)
by diggingdeeper - 26th Mar 2024 3:09am
Old Hall in Higher Bebington
by diggingdeeper - 24th Mar 2024 5:58pm
Netflix 3 Body Problem.
by BultacoAstro - 22nd Mar 2024 8:04am
Wisper electric bike. 36v .
by Dilly - 21st Mar 2024 7:36pm
This is Elvis
by GingerTom - 21st Mar 2024 9:27am
March
M T W T F S S
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
Top Likes Received (30 Days)
cools 1
Kylix 1
Top Likes Received
bert1 14
Mark 4
granny 3
casper 3
Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
#274225 7th Dec 2008 9:20pm
Joined: Jul 2008
Posts: 690
Veteran
OP Offline
Veteran
Joined: Jul 2008
Posts: 690
Its doing my head in now.

I mentioned it in the past but it went and now its doing it again. As i drive along it stutters and throws a load of fuel down the exhaust (i think) so you get a bang and sometimes flame. It seems to do it only under about half throttle and up and when the car comes on boost, but not always. You can hold 10psi or more and its ok then suddenly itll do it at 2psi. Its completely intermittent and i see no connection of circumstances between when its happened. Sometimes itll drive off, sometimes it wont.

Ive removed the filter, no change. Ive added injector cleaner, and it didnt do it again for a while but i dont reckon that helped. Leads and dizzy are ok. Some people suggested the cam but i dont want to fork out on it if it turns out not to be. After that it starts getting into electronics.

Any ideas anyone?

And can anyone suggest somewhere to go to get it looked at who know their stuff? Im getting fed up now.


I HATE cars.
[Linked Image]
Google Ads
Joined: Nov 2003
Posts: 12,002
Wiki Master
Offline
Wiki Master
Joined: Nov 2003
Posts: 12,002
Deffo an electrical problem.

Possibly the MAP sensor.... think


What If There Were No Hypothetical Questions?
Joined: Nov 2008
Posts: 56
Member
Offline
Member
Joined: Nov 2008
Posts: 56
isnt it called MAF

Joined: Nov 2003
Posts: 12,002
Wiki Master
Offline
Wiki Master
Joined: Nov 2003
Posts: 12,002
MAF is a Mass Air Flow sensor and works with a hot wire to measure air flow in to the engine.

The Turbo'd fords use a MAP (Manifold Absolute Pressure) sensor to measure inlet manifold pressure as a way of measuring air going in to the engine smile

The both do the same job of measuring air going in to the engine, though technically the MAP sensor method is more accurate on a F/A car.


What If There Were No Hypothetical Questions?
Joined: Jul 2008
Posts: 690
Veteran
OP Offline
Veteran
Joined: Jul 2008
Posts: 690
OK cheers. Would that still cause it to be intermittent though?

I went out today and it was fine but once it got some welly it started again.

Ill see about getting it changed either way, at least its one less thing it could be.


I HATE cars.
[Linked Image]
Joined: Nov 2003
Posts: 12,002
Wiki Master
Offline
Wiki Master
Joined: Nov 2003
Posts: 12,002
Its a pressure sensor - first time you give it some it may stick open and take a while to close again.... think


What If There Were No Hypothetical Questions?
Joined: Jul 2008
Posts: 690
Veteran
OP Offline
Veteran
Joined: Jul 2008
Posts: 690
OK, ill give it a try then.

Does the type of sensor reprisent the pressure it can read. For example, a 1.5 bar MAP will read up to 1.5 bar, and a 2, 2.5 and 3 bar all the same or is there a difference?

What happened to the good old days of twisting screws on carbs eh?


I HATE cars.
[Linked Image]
Joined: Jul 2008
Posts: 690
Veteran
OP Offline
Veteran
Joined: Jul 2008
Posts: 690
I cant any map or maf sensors, and i had a look at the car and the things i can find are a pipe to the ecu from the manifold and a sensor on the charge carrier. Ive found these on burton power and its described as 'AIR CHARGE SENSOR ESCORT RS TURBO -5/90'. Do you think that is the sensor im after?


I HATE cars.
[Linked Image]
Joined: Nov 2003
Posts: 12,002
Wiki Master
Offline
Wiki Master
Joined: Nov 2003
Posts: 12,002
Ive only heard them called MAP sensor matey...

1 bar with MAP sensor is atmospheric, so a 2 bar sensor is accurate up to 15psi / 1 bar, and a 3 bar MAP sensor is good for 2 bar (30psi) boost pressure.

Its generally a small unit with a pressure / vacume feed and a loom connector.

There are quite a few 3 bar items, though Im not sure if these will run on your ECU think



What If There Were No Hypothetical Questions?
Joined: Jul 2008
Posts: 690
Veteran
OP Offline
Veteran
Joined: Jul 2008
Posts: 690
Well im running 17psi atm so id expect a 2.5 or 3bar jobbie then. I hope anyway. Ill have a proper look again in the light tommorow. Just had a look again and theres a black thing opposite where the cable pulls the throttle body. I always thought it was the throttle position sensor but it looks similar to the MAP sensors in pictures. As i said, ill have a proper look in the afternoon, im tired now.

Cheers for the help btw, much appreciated.


I HATE cars.
[Linked Image]
Joined: Nov 2003
Posts: 12,002
Wiki Master
Offline
Wiki Master
Joined: Nov 2003
Posts: 12,002
Chances are that is the TPS - the MAP sensors are generally mounted on the bulkhead, away from the heat and vibrations of the engine.

f you find you have a 2 bar map sensor (I belive this is std) and your running 17psi, that could well be the problem...


What If There Were No Hypothetical Questions?
Joined: Jul 2008
Posts: 690
Veteran
OP Offline
Veteran
Joined: Jul 2008
Posts: 690
I had a better look today. That is the Throttle pot. Theres a funny pipe that runs round the back of the manifold but it then goes into a round filter type thing and back into the manifold at the back. Theres also a pipe from the top of the manifold that runs straight to the ecu. If i opened the ecu up do you think i might find the MAP sensor in there?


I HATE cars.
[Linked Image]
Joined: Dec 2003
Posts: 5,683
Wiki Guide
Offline
Wiki Guide
Joined: Dec 2003
Posts: 5,683
Sounds like something simple like your plugs - are they gapped properly? You could also have fuel leaking into the inlet through dodgy, leaking injectors or your Fuel Pressure Regulator.
Does it come on after a certain period of time (like motorway driving)?


"C20 LET bang"
Joined: Nov 2003
Posts: 12,002
Wiki Master
Offline
Wiki Master
Joined: Nov 2003
Posts: 12,002
Good point Station, though the S1 and S2 use a mechanical, Bosch, Fuel injector system - it could have something to do with that.... think

Its a bit of trial and error Dave, I think you really do need to change some parts for known working items to rule things out though...


What If There Were No Hypothetical Questions?
Joined: Jul 2008
Posts: 690
Veteran
OP Offline
Veteran
Joined: Jul 2008
Posts: 690
I know the leads are good.
Ill try the plugs next. Ill whip em out n clean them if i get a chance on the weekend. Check the gaps too. I know they need to be pretty small on a high boost car.
It has a brand new higher pressure electronic pump so i know thats good but im not too sure about the rest of the fuel system. I guess ill have to get the injectors spray tested and leak tested.
I dont really want to get too involved about the fuel injection system, i dont really know much about it to be honest. I know how it all works, just no experience with it.


I HATE cars.
[Linked Image]
Page 1 of 2 1 2

Moderated by  Mod 

Link Copied to Clipboard
Random Wirral Images

Click to View Topic.
Newest Topics
Facial recognition coming in supermarkets?
by Excoriator - 27th Mar 2024 10:52am
Hot Spot Chippie Broadway
by Excoriator - 26th Mar 2024 7:57pm
Bolts at Bebington Road
by Excoriator - 23rd Mar 2024 9:48am
Netflix 3 Body Problem.
by BultacoAstro - 22nd Mar 2024 8:04am
Tall Brick Chimneys
by diggingdeeper - 16th Mar 2024 11:56am
For Sale & Free
Wisper electric bike. 36v .
by Dilly - 21st Mar 2024 7:36pm
This is Elvis
by GingerTom - 17th Mar 2024 2:37pm
Member Spotlight
Dilly
Dilly
wallasey
Posts: 8,973
Joined: July 2011
Today's Birthdays
There are no members with birthdays on this day.
New Wirral Info
Facial recognition coming in supermarkets?
by Excoriator - 27th Mar 2024 10:52am
Hot Spot Chippie Broadway
by Excoriator - 26th Mar 2024 7:57pm
Bolts at Bebington Road
by Excoriator - 23rd Mar 2024 9:48am
Get your Money Tree ready
by keef666 - 22nd Mar 2023 12:27pm
Restaurant/pub with outdoor seating - Bromborough
by CarterUSM - 7th Aug 2020 7:59pm
News : New Topics
Gaza
by diggingdeeper - 29th Oct 2023 9:28am
Lost river (Well, brook really)
by Excoriator - 10th Sep 2019 8:50am
New Enthusiast Forums
Netflix 3 Body Problem.
by BultacoAstro - 22nd Mar 2024 8:04am
Xbox
by TudorBlue - 3rd Mar 2024 8:48pm
Wiper mechanism needed
by Peter0787 - 20th Feb 2024 4:07pm
Popular Topics(Views)
5,069,561 WIKI WALK CHAT
4,013,783 Spotted!
Powered by UBB.threads™ PHP Forum Software 7.7.5