i'm guessing here, but i think you have toe issues... that used to happen to my R/C car, when the wheels point inwards towards the front, as viewed from above(positive/negative?), the front end lurches up when i move forward.
what happens is when the car moves forward, the wheels will try to move inwards, causing the suspension to move up, its like squeezing the front tires towards eachother

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project