If the oil is around the spark plug wires, it seeps into the wire making a poor connection to the spark plug causing the spark to short at the cylinder head and not travel to the plug, resulting in misfires and rough running. I'm not sure how a degreaser could cause a rough idle, unless a lot of it collected in one spot and is basically doing the same thing the oil was
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1989 7MGTE R154 Targa Top White Package w/Blue Interior
Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels
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