Air Mass

[championlad]

Hi,
I have a 1996 C180. The engine had a pinging coming from the engine so i replaced the Air MAss Sensor. it soted the problem and ran ok for a bit. now i am having these problems.
The Carb Spit on 1st start till its warm.
When its warm and i sit and rev it only gets to 4000rpms and then just stays there . i get the feelin of loss of power when driving and if i swtch off and let cool for a bit then start to drive again when at the lights or stopping the revs will dip to nearly stalling point then jump to over 1000 then back down. will do this for a bit then go stable.
I dont want to have to pay a frotune to diagnose the problem. please can anyone help............
Can it be a faulty air mass sensor. or something else.

 

[colechelle]

well the carb spitting is the ign timming out, firing before the valve has closed, it will only rev to 4000 unless its in drive! and sounds like you got an air-leak on the inlet side!!

 

[colechelle]

sorry just re-read that, carb??????

 

[television]

2 things first the car will not rev more than 4k rpm in neutral

If the MAF that you bought was a cheap one from Ebay and not a Bosch,,then it could be that again

 

[championlad]

Hi Thanks
So the revs will not go any higher stationary. its a manual.. i always thought reving would go as high as ya let it.
Yes i did do the sin of all mercs. i brought a cheap air mass sensor for £50 not the merc one for £180.. would the systoms i am having be the Air Mass Sensor. anyway i can test it beforer i splash out £180.

My car is amazing other than this isssue and its making me want to just get rid
:-(

 

[colechelle]

cheap one are always replaced within weeks of fitting, there crap, oh and welcome to the site!!

 

[championlad]

Thank you for the welcome.
Yeah i was advised to get the proper unit though i did go cheap :-(
So you think it could be that that is my problem and nothin else like carb or fuel somehow.

sorry i am quite new to this.

 

[television]

Unplug it and try the car

 

[colechelle]

dont think your car has a carb, mercs not used them for years!!!!

 

[jibcl500]

Hi Thanks
So the revs will not go any higher stationary. its a manual.. i always thought reving would go as high as ya let it.
Yes i did do the sin of all mercs. i brought a cheap air mass sensor for £50 not the merc one for £180.. would the systoms i am having be the Air Mass Sensor. anyway i can test it beforer i splash out £180.

My car is amazing other than this isssue and its making me want to just get rid
:-(

Im not going to say a word..............................................

jib

 

[television]

dont think your car has a carb, mercs not used them for years!!!!

around 1983 I think Cole there is the odd 201 floating around with a carb,, stats007 has one

 

[championlad]

I unplugged it and still doing same thing

 

[Alex M Grieve]

around 1983 I think Cole there is the odd 201 floating around with a carb,, stats007 has one

I had one of the later carburated 190s - first registered Nov 1989. Much under-rated - went extremely well - kept it 9 years, no faults.

Well, not strictly true, the battery failed when it was 9 years old - so I took it back and complained!

I suspect the carb had to go when catalytic converters arrived?

 

[recycledjuvenile]

change the airmass to a bosch one. bakiring or struggling to rev is a sign.
And the car will not rev past 4k in neutral as the fuel cut off will jump in .In gear you can happilly rev to the red line ( not advised)

 

[championlad]

Thanks

I should say though at this point i unplugged the plug and drove it and it was worse. no power, so i plugged back in and drive about tongiht for a while . when the engine gets really warm the car is fine no probs at all. its just driving at first.

 

[television]

Thanks

I should say though at this point i unplugged the plug and drove it and it was worse. no power, so i plugged back in and drive about tongiht for a while . when the engine gets really warm the car is fine no probs at all. its just driving at first.

Think it still points to the MAF,,the bosch ones are the only ones that last

 

[championlad]

Hi, i replaced it about 8 weeks ago. do you think i should get the onboard comp reset

 

[Aletank]

I tried 2 £40ish MAF;s from German Swedish n French and both was worse than my original !! They refunded me me on both and I bought a Bosch unit for £142 delivered from www.airmassmeters.com and what a difference!!

 

[dragon]

The 1992 190E still got distributor cables and no MAF as I can remember. It an injection and remember there is a switch between leaded and unleaded.

When I saw the E280 Auto-car, shocked it got M111 similar to my W202. Mixed and matched in different models when parts available. At least my W202 still running and immaculate under the bonnet. Would nice to put it in the garage. Feel very sad to leave it in the frost night after night all because I got only one garage for my slk.

 

[dragon]

Cheap MAFs

http://cgi.ebay.co.uk/Mercedes-Benz...14&_trkparms=72:1345|66:2|65:12|39:1|240:1318