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        General >> Give/Need advice to/from others >> emissions
        
(Message started by: Torbayboy on Oct 9^th, 2020, 6:52am)

Title: emissions
Post by Torbayboy on Oct 9^th, 2020, 6:52am

My silver "baby" went down on emissions yesterday, any tricks in the trade to help?

Sorry, forgot cossie of course.

Title: Re: emissions
Post by Tenfut on Oct 9^th, 2020, 8:30am

This is what I do, can't be sure it helps but always passed on emissions.

Ran for a month on BP Ultimate petrol (about 9p per litre more expensive)

Full can of injector cleaner when down to half tank of petrol

Thrash down motorway for 20 miles or so immediately before test.

Ask tester to do emissions first while engine still very hot.

As I say I can't be sure it helps but it might for minimal cost.

Tony

Title: Re: emissions
Post by a900one on Oct 9^th, 2020, 10:04am

Mine were high to start with but they some how got them in, have the MOT regs changed recently. The normal checks may help, air filter, clean ?, clean the maf, and as Tony says fast/high rev drive before taking it in. Have you got the fail sheet to put on here, or reg.

Gerald

Title: Re: emissions
Post by Tompion on Oct 9^th, 2020, 11:24am

Not sure how much it helps with emissions but clean the MAF.
People say intake air leaks can be a problem on the cossie so check all the hoses, T-pieces etc.
Have you run a diagnostic to check for codes especially oxygen sensor ones & see what sort of graph you get for them.

It could of course be the cats, my tester comments on how good emissions are since last time I fitted a new cat.

Title: Re: emissions
Post by Torbayboy on Oct 9^th, 2020, 6:14pm

Anyone got the specs for 1995 on emissins which I think should be for my 97 cos?

On my fail sheet is shows GRANADA 2998cc may this have an impact?, as the last 3 litre I had was an S reg capril 3.0 sport (nuts compared to the ghia I had and even more nuts compared to the lovely scorpio)l
Comments welcome will list fail details later
???

Title: Re: emissions
Post by Torbayboy on Oct 9^th, 2020, 6:38pm

Ok had T now here's whats the matter

it seems just the C O is the problem, the Hc and lambda are fine

on 1st fast idle only went down to 1.27 (target 0.3)

on 2nd fast idle went down to 0.71 (target 0.3)

Natural idel hit 0.5 (max pass )

Cruising etc the car shows 25-28 mpg regularly and even mixed round town etc will show 22 ish, the other that flew through on Monday is only showing 21-22 on mixed use, dont know if the comparison is useful, but the cars are 2 years apart but both same model.

Next steps anybody?

Note this car has the obliglitory uselees engine temp guage, would this affect the readings, I believe there are 2 engine temp sensors and the other non dash one is what the "brain" uses.

Title: Re: emissions
Post by Tompion on Oct 9^th, 2020, 7:30pm

I've never had a problem with the temp gauge, if ever the needle's not stayed in the middle changing the stat has fixed it but then it's easy to do on the 2.3.
If the engine temp sender is wrong that may well affect emissions.
If you have a laptop a scan should be the next step using Forscan free software & an elm scanner.

Title: Re: emissions
Post by Torbayboy on Oct 9^th, 2020, 7:46pm

Hi Tompion,

Never had the pleaasure of the famous R reg temp guage, quite frightening at first appearance.

The needle generally sits mid way then decides to do as it pleases, sometimes alright for weeks then on a longer journey (generally in the mddle of nowhere) it plays up and falls away never reaching the stop at the bottom of the guage, and very gingerly creeps up a little, but sometimes take your mind off it and "bingo" it's back where it should be.

Had this on virtually all bar M reg cars (had a few as you know)

We fixed the last one with the screw in engine temp sensor at the front of the motor.

Just was curious if this would make the car run rich, (a petrol smell was reported by local spanner as they tried to get it through earlier today)

Shame really as this was gonna be a keeper, but if I cant fix this at reasonable cost it has to go, by comparison the Monday "lovely car" went through with 0.00 CO on its emissions!!
;D

Title: Re: emissions
Post by Tompion on Oct 9^th, 2020, 8:54pm

If the sender is telling the computer the engine is cold then it will richen the mixture much like leaving the choke on on older cars.

Title: Re: emissions
Post by a900one on Oct 10^th, 2020, 9:04pm

Are all the o2 sensors the same on the cosworth ?. I

Title: Re: emissions
Post by Tompion on Oct 11^th, 2020, 12:42pm

There are different Ford part numbers but I believe this is down to the wire length not the sensors.

Title: Re: emissions
Post by amigafan2003 on Oct 11^th, 2020, 6:48pm

What did the temp gauge show during the test? The tester should abandon the test if the engine isn't up to temp.

Have you tried an "Italian tune up" just before the MOT?

Title: Re: emissions
Post by Torbayboy on Oct 12^th, 2020, 6:00pm

See my note (4 above0 if you haven't had an R reg you may not have encountered the failing temp guage, tends to show properly temperature if you use the mileage zero button and scroll through, but the guage needle has a mind of its own.

It's generally cured by new temp sender on front of engine.

Have had this with at least 3 scorpios

Title: Re: emissions
Post by a900one on Oct 12^th, 2020, 6:22pm

My R reg has not had problems with the temp going down, goes up untill the fans kick in when the weather is hot.

Title: Re: emissions
Post by Torbayboy on Oct 14^th, 2020, 4:08pm

Well loks like the temp guage sender had a bearing on it.

Passed today, but at a different garage with a differnt set of advisories.

Wroom vroom baby......... :)

Title: Re: emissions
Post by Nunnspoet on Oct 15^th, 2020, 11:01am

;D.

Well there you go! Well done and enjoy 8)

Mike ;)

Title: Re: emissions
Post by QuentinG on Oct 15^th, 2020, 9:38pm

Glad it passed Roy, you would think if garage 1 had it down as Granada 2998cc, then the pass standard would be lower than for yours, is that the old Essex V6? What figures did garage 2 quote for the CO anyway?
One problem I never had with mine was the temp gauge, always nice and steady around the middle.