Hey All I Have A 93 SC400 Pearl White and a stock engine. for about 2 months i have had a vibration in my engine when say the car is park or neutral, i hold steady RPM's at pretty much any range. i usually go for about 2k rpm's and a vibe. will start about 3 seconds, then go away and then all is perfectly smooth, then another 3-4 seconds later, it comes back. its repetitive and a nuescence it does it while driving down the road too. but just as an example.
i took it to my old work place, (automotive diesel, ) and hooked up our snap-on modis, (Scanner) and found 2 codes yet no check engine light, and both codes were for air flow sensors, meters, or what ever. well my buddy was cheking each channel of the MAF wiring harness, 4 wires and the modis was placed on the driver side of the car and the wires were stretched over to the mass air flow center. and he could not get readings cause when he had the cords close to the engine he was getting too much interference from the engine, so maybe i though it might be bad wires somewhere???
oh and p.s., i checked all vacuume hoses
thanks all help would be appreciated!
Phil