Startup Weird?

[gungfudan]

my 94’ always starts up idles around 1000-1100 rpms then drops down to 800-900 rpms and stays there. Just recently, over the last three months, it has started up and ran around 2000 RPMs and drops to 1000 RPMs. It has only done this about three times in the past three months.

What could be the issue? I was leaning towards dirty MAF sensor or bad TPS?

 

[Dirtman]

Did you leave the heater on when you went to start it those few "weird" times? It's normal to start at high rpms 1,000-1,500 and then drop. If you have the heat or AC on a setting where the compressor is going to run that will knock the rpms up even farther so 2,000 would still be normal. (Almost every heat setting also runs the AC compressor).

Giving the MAF and IAC a good cleaning is never a bad idea though.

 

[gungfudan]

Did you leave the heater on when you went to start it those few "weird" times? It's normal to start at high rpms 1,000-1,500 and then drop. If you have the heat or AC on a setting where the compressor is going to run that will knock the rpms up even farther so 2,000 would still be normal. (Almost every heat setting also runs the AC compressor).

Giving the MAF and IAC a good cleaning is never a bad idea though.

Yes I did and that makes sense thanks for the quick reply.