hey im not sure if this has alrdy been mentioned but this is a wierd one for me.

Just happened today

When i gas at around 2500rpm - 3500rpm the idle drops DRAMICTICALLY down under 1000rpm and then spikes back up. The car jerks. It happened before when my gas tank was low, but my gas is 1/4 left so it should be ok ....

any idles ?
my idle is steady at 750rpm...
straight pipe 2.5
intake
86 gxl w/ 140kms on it non rebuilt

any help out there ?

 

fuel filters
grounds
tps
and the list goes on and on...