Rough Fast idle

[donmac45]

Is there anyone in NZ that is prepared to lend me (for a week) a MAF that is a proven good-unit? I have a problem with my '95 -Cold start fine, runs well for a few minutes, -as it warms up it develops a lumply idle -almost to the stalling stage. Hard acceleration fine. Have had 4 different 2nd hand MAF's in it (all give slightly different symptoms), changed the coils, plugs, run injector cleaner. Cleaned all ignition and injector connections. Altered TPS -exchanged fuel pump. Miss not confined to one cylinder.
No black smoke.
Auto electrician has looked at twice -plugged in to OB -no reported errors. Throws no codes.
I find it hard to accept I have had 4 bad maf's, but if anyone described the symptoms to me -first choice bad MAF. I hesitate to spend $$$ on a new one if that is not the problem -hence plea to borrow one. ( I will cover all postage)
regards Don Mac