For those that dont know I have just purchased my old Short wheel base N/A manual back.

 

It has had a slight misfire since getting it back, this happens more when the car is sat ticking over for a couple of minutes and when I go to pull away it takes a few seconds to clear.

 

Today when I went to leave work the car fired briefly and then just turned over and would not fire, very strong smell of fuel although I did not touch the throttle.

 

Normally the car fires into life instantly with the engine not even turning over once.

 

Im guessing this may be MAF but wanted some advice, I have added a couple of pics of an after market filter which has been on the car for years.

 

Should I try to get a standard airbox back on the car? no other mods other than exhaust.

 

Your help will be appreciated once again.

 

Dave

Why is the filter in a biscuit tin?:ph34r:

i guessing to stop water getting at the maf but very odd way of doing it lol. il have a stab as no one else has, i recon ou may have a feul leak that isnt allowing full feul pressure to get to the injectors and its leaking out premeaturly. lean mixure, poor running feul smell. with the engine cold get the bonnet opne and fire her up then check all teh fuel lines including teh one under the throttle cover.

I cant believe there is a biscuit tin round the base of the filter.. its a nightmare waiting to happen when it rains..

I would have a guess your PTU is failing with those symptoms

Thanks for the reply's.

 

No idea about the tub around the filter?

 

Where is the PTU located and what does it do? Is there a fix or straight relplace?

 

Thanks Dave

yeah sounds like the ptu, i had the same thing a while back and switched to a series2 ptu, its shown in the pic the metalic box with fins on, hope it helps.

 

dan.:biggrin:

surely even if maf knackered car would still start,when my maf when took from a small miss to huge power loss and limp home mode month or two,even then always started and reved fine just under load i had problems,id say dannzx on the money.

No one said MAF mate, they all said PTU and yep is the most likely.

smithy

I read in a cone filter guide (http://s95014253.onlinehome.us/63104/80397.html), that after fitting; air can enter the cone into the MAF with weird turbulence, causing the MAF to read the airflow incorrectly causing running problems. It was suggested that deflecting the air away from the bottom of the cone would cure the problem. I think this biscuit tin lid is for that purpose, though doesn't need to be a cup shape which can hold water.

 

Drill a drain hold in it I guess....

Edited March 19, 201114 yr by MasterCookieman

I took the MAF out today and cleaned very carefully and it seems to have stopped misfire, I will run it for the next couple of days and if its not sorted I will replace MAF and PTU.

 

Its actually the bottom of a bucket I noticed today (not that it makes a great deal of differance) the are drain holes in it though.

 

Thanks for the response guys Dave