car idles fine when not running a/c. but rpm,s drop instead of going up when i use my a/c. it drops down to about 600 or less. my other two cars do the opposite they run about 1100 to 1200 rpm,s at idle. any suggestion are greatly appreciated. thanx edgar

I started pulling my motor apart today and I found this crack across 2 water passages and 1 head bolt hole. It doesn't go down into the threads and I don't see any sign of water leaks. Opinions?

My car: 89 650/950 walbro 255. 292/280 cam mechanical.   My issue is that as soon as I am moving and touch the gas. It instantly drops to 10:1 AFR and bogs. It does with a stock MAF, 1g, and a Maf-t. I tried to tune around it thinking it might be an excess of fuel from the cam duration, but have seen just a little difference. I reset and tested my TPS and my MPS is good. The rest of the fuel curve is just fine, including idle.   2nd issue, and might be related. My car appears to flood it

LOCATION: Evansville Indana SHIPPING: Pick up only MILEAGE: 181732 and going up as its a daily PRICE: 2300obo RUNS: Yes MANUAL/AUTOMATIC: manual ENGINE MODS: Stock NON-FUNCTIONAL PARTS/FEATURES OR PROBLEMS: Needs a rear driver side rotor due to being warped and basic tune up. Other than that its never left me stranded and i drive it daily. RUST?: Rust free as far as ive seen DESCRIPTION: I daily drive the car as stated about 30 miles a day, never gave me a problem however when getting it the pre