Car now running crap

[Steve-E30]

Cars been running a little lumpy at tickover and when you pull away it runs flat and stunk of fuel from the exhaust .
Did the inlet manifold gasket tonight and cleaned all the throttle out and inlet manifold and icv , Put it all back together and it ticks over at 1,700 revs without any throttle cable attached
Picks up reasonably well when driving but seems lazy responing to throttle , Any help appreciated guys

[irish320i]

possibly the trottle posistion sensor but idling at 1700 would sould like the air inlet is leaking or idle control valve acting up

[Steve-E30]

When it went into work it hunted really bad and with a full tank of fuel it did 159 miles
Had to adjust the throttle up slightly otherwise it cut out all the time
Suspected inlet manifold
Now it runs as above , If i unolug the afm or icv it makes a difference so i take it there ok

[Steve-E30]

Oh and tonight it ran absoltely shite , Really smells of fuel and is overfueling i guess as no leaks , Broke down and took ages to start

[Steve-E30]

Nobody

[pompey06]

fuel pressure valve, idol valve?

[Steve-E30]

So farthis moring i have borrowed my mates icv and afm and make to difference at all , As before , Car ran ok before we did the work , No air leaks either
Ill see if i can nick his fuel pressure valve , Cant work out why it ticks over so high and really lumpy though , Car wont start again now as if its flooded .

[pompey06]

ecu

[FlappySocks]

Unlikely to be the ecu. Before you do anything else, check the blue temperature sensor.

[irish320i]

did you try the trottle posistion sensor mine refused to start at one stage because of it

[FlappySocks]

It could be a TPS issue as well, but it sounds more like an air leak,blue temp sensor, AFM issue, in that order. Test the blue sensor first, then check again for leaks with WD40, or if your brave, propane.

[bobafett]

what have you cleaned out the throttle with ? have you shorted or shorting out the T P S .???

[Steve-E30]

Throttle position sensor knacker , Afm and icv cleaned with carb cleaner and there ok , Run fine on both cars , No leaks as just had them sorted , How do i test the blue sensor ??
Car running at mo but lumpy at low revs and throws out black smoke when revved .

[FlappySocks]

Unplug it, and measure the resistance. Check it against this resistance/temp chart:
http://www.bosch-motorsport.com/pdf/sen ... _M12-L.pdf

[320Touring]

Ok- lets sum this up in one post...

Car running lumpy and smoking when revved.

Work carried out - Replaced Inlet manifold gasket.

Tried replacing/Cleaning

AFM (with known good)

ICV


Looks like car is overfuelling due to either-

unmetered air getting in

or possibly, air intake is restricted so car is overfuelling for air available?

[FlappySocks]

Or Blue temp sensor is telling ECU the engine is cold when it's not = over fueling. Simple to test.

[Steve-E30]

Ok- lets sum this up in one post...

Car running lumpy and smoking when revved.

Work carried out - Replaced Inlet manifold gasket.

Tried replacing/Cleaning

AFM (with known good)

ICV


Looks like car is overfuelling due to either-

unmetered air getting in

or possibly, air intake is restricted so car is overfuelling for air available?

Replaced throttle body and tps known to be good and clicks , Replaced and cleaned afm , icv , Replaced fuel pressue regulator .
Work carried out previously was replace inlet manifold gasket .
Car still runs rich and a little hesitent when revved and slightly lumpy now , Will replace cold start sensor tomorrow as now dark

[Steve-E30]

My ecu is ending in number 164 and the one ive pinched bits off is ending in 073 so take it that its not compatible ??
Also the cold start sensor makes no difference when unplugged .

[davidt]

Steve, have a look at the multi plug under the inlet manifold, the wiring for the coolant temperature sensor goes through it. the CTS is worth changing as it tells the ECU to keep the injectors open longer on cold starts.

[Steve-E30]

Cheers david , I did clean that one up as well as others and know exactly which one you mean , Few of the terminals were a bit furry but not to bad . Cheers for the thought anyway

[Brianmoooore]

I suspect davidt is the closest to solving this! Check under the rubber cover of the lower half of this plug and socket.

[Brianmoooore]

My ecu is ending in number 164 and the one ive pinched bits off is ending in 073 so take it that its not compatible ??
Also the cold start sensor makes no difference when unplugged .

The 164 is a slightly newer version of Motronic than the 073, but all the external stuff is the same.

[Steve-E30]

My ecu is ending in number 164 and the one ive pinched bits off is ending in 073 so take it that its not compatible ??
Also the cold start sensor makes no difference when unplugged .

The 164 is a slightly newer version of Motronic than the 073, but all the external stuff is the same.

So will it run mine then ??
Sorry if i sound think , Had a hell of a day with the car today

And a big thanks to jamie (jam172) for popping down and being a big help today with the swap over

[Brianmoooore]

So will it run mine then ??

They are interchangable.

[Steve-E30]

Thats what i like about this place , everyone is so helpful , Cheers guys
Ill update tomorrow

[davidt]

This plug is the work of the Devil, it caused the only breakdown my car has ever had, for some reason water gets in and sits in the bottom half of the plug, so as Brian suggests check out under the rubber boot. but be careful if the connectors are corroded the wires may break off as it did on mine. I have now wrapped it in self amalgamating tape to keep it water
tight.

[Brianmoooore]

The plug and socket themselves aren't really necessary. There's no problem with removing it completely and soldering/ heat shrinking the wires together.

[Steve-E30]

Went out tonight with a spare ecu to fit it at a local retail park , Nice lighting and nobody to annoy with the car running , I have elderly neighbours
The ecus are different , Mine has 3 rows of pin and the other has 2
About 3 miles from home the car started jumping about agin the died , 1" split in a fuel pipe
Tomorrow im gonna clean up that plug again , Change the blue sensor and replace all the rubber fuel lines
After that i will give up .... Not

[Brianmoooore]

The ecus are different , Mine has 3 rows of pin and the other has 2

Yes, you're right! You wrote 073; I read 173!
The 073 is a bit of a primitive device, and best avoided.

[Steve-E30]

You wrote 073; I read 173

Specsavers brian
Right , Cleaned the plug out again under the inlet manifold so terminals were uber clean , New blue sensor and it ran better but not brilliant , Had a spare air flow meter and it made it a bit better but we think the screw had gone as it made little adjustment , Nipped in my bay at work and pulled out my original afm which i thought made it run rich , Cleaned it up and adjusted it on the car and it goes lik a flippin rocket now
Thought it run well before so am very happy now
Cheers for all the replys guys , Much appriciated , Think it was a mixture of a few things in the end , Will see how it goes in the morning but should be ok

[FlappySocks]

Well done. I wanted to know who won, but I guess we will never know now.

[Steve-E30]

Deffinatly blue sensor , Plug had been cleaned up once anyway but double checked it and cleaned again , Weird how the airflow meter runs perfect on my mates but crap on mine ... Weird

[320Touring]

At least its sorted now- good news Steve!

[FlappySocks]

Deffinatly blue sensor

I WON!

Do I get a prize?

[Steve-E30]

Cheers mate , Had me and a few baffled , See what its like on a morning now from stone cold , After the drive home its a different car Good advise from friends and zoners sorted the problem , Very happy now