e30 idles problems!!

[MichelKesin]

sup guys i got a e30 2.7l stoker got the kassel 2.7l Stroker Tune for it and as soon as i installed it. (correctly i triple check it) it started to have idle problems where it idles at 400-500 which the tune said it's supposed to dump idle to 900. when it gets warm enough it bumps it to "normal idle" which is around 700-750, but everytime i try to stop the car for example a stop light the idle boggles if that's the word for it. aka the idles goes wayyyy down to 200-400 and jumps up and down for a good 3-4 seconds where it wants to die. it seems like it's acting that it has a vacuum leak. which i know it doesnt because it worked perfectly fine before with the stock chip on it, worked like a perfectly normal car well "normal" it doesnt boggle idle. and oh it runs pretty rich too.
to the people i've tried reaching out they said adjust the afm which i got no clue how to open the afm. and some people are saying unplug the o2 sensor to reset it to default? can anyone suggest anything on what i should do or get to fix it? to get that 900idle and not boggle idle or the car wanting to die. it seems like it's getting flooded that's why it's dying.
Let me know if anyone wants videos of what's happening when i try to stop.

[BristolE30]

Sounds like the only thing you’ve changed since having issues is the chip. Sounds like the chip could be your issue?

Have you tried reaching out to Kassel?

[onthames]

Take plastic cover off AFM and clean with electric contact spray. Go through diagnostics on wiki for icv and TPS. Check blue temp sensor as per wiki. Smoke test for vacuum leaks

[rix313]

As Bristol says, put the old chip back in, if it works there there's something amis with this Kassel chip. Do not adjust the AFM, opening a can of worms there. Ideally I would suggest taking the car to a tuner who is familiar with the engines and ECU's of these cars and have them map it correctly. Sure it's more expensive but it will be right,