Hi guys,
I have a 1992 Bighorn, 3.2l v6 DohC. 6vd1 Petrol auto.
When I got it the engine bay was dusty and dirty so I gave it a blast out and let it dry. Problems started from that point onwards.
At first it was misfiring, idling rough, knocking and the fuel consumption was through the roof. I so far have slightly fixed the misfire which was bad sparks and an ignition coil into bank 3 (I replaced all spark plugs and the ignition coil).
I was told it was the EGR valve so i pulled that and found the filter was the wrong way and corrected it, nothing was wrong with the egr valve though I suspect it might need a new hose. Since then it has run a lot better and the fuel consumption has gone down.
The last problem/s that I need to fix are a bottom end knock which actually feels like a miss or a mini explosion. The reason I think it's a fuel problem is because when I drive it sounds like it's overfueling and under fueling at the same time. When it picks back up there is a knock but sounds more like a little explosion. Could be the exhaust system not allowing the exhaust fumes to escape? Maybe a sensor?
Also a vaccum leak around 1500 - 3000rpm but re-seals after those acceleration points. Really not sure about this problem or anything to do with acceleration.
Any help please? I have been slowly making this thing run better and some other forums have similar things but nothing about this?