Date: Sun, 17 Apr 2005 11:54:16 -0400 From: KeithG <noonenospamay.com> Subject: Re: C900 Check Engine Air Mass Meter Disaster - HELP
It sounds like your '87 has Bosch LH 2.2. Was the head gasket replaced recently? Has it run poorly since then? Could be that the cam timing is off. If no, the best way to figure this problem out is to check the operation of the system with the help of the o2 sensor. Sometimes the AMMs go bad. Sometimes, they can be adjusted to bring back normal operation. It does sound like it could be rich, or possibly retarded cam or ignition timing. first check that the timing is set to 16 BTDC at idle. Second, check o2 sensor operation. If the o2 sensor heater fuse is blown, or of the heater is otherwise non-functional, it will also not run right, either. If all this is good... There is a method of AMM adjustment. I do not know how equipped you are to DIY this, but it is not too hard with an DVM and a screwdriver... Basically, remove plug from AMM and twist screw CW and CCW 'till the 'average' o2 voltage is 0.5v. KeithG Al wrote: > I have a 1987 T16 Aero. It isn't boosting fully, and my specialist blamed > lack of fuel on the Bosch mass air meter (Part Number 0 280 212 0050) > > I got a spare "working" one off ebay, and tried it today. Immediate check > engine light and lumpy running, no go at all when the accelerator depressed, > like the cars being held back. > > I immediately re-fitted the original, but have exactly the same symptoms! > > Is there a way of re-setting the system, would I be right in suspecting the > engine management system has switched to an emergency setting. > > Whilst my specialist blamed the original part, it did at least run fairly > well, even if I wasn't getting all the boost I wanted. It now exhibits all > the faults of the newer part I bought. Would a reset prior to using the > newer part be worthwhile? > > A new part is getting on for £200, which is frankly beyond my budget for a > month or so, your help would be much appreciated as this is my only > transport currently and I don't fancy the train! > > Al > > > > >
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