X2 on the vacuum/intake leak. I had a brand new intake boot tear when I installed it causing this exact symptom. -----Original Message----- From: bustravler@xxxxxxx To: tcb@xxxxxxxxxxxxx Cc: Gerald Livingston <gerald.tcb@xxxxxxxxxxxxx> Sent: Wed, Oct 20, 2010 7:38 pm Subject: [tcb] Re: Plugs -- need answer before 8pm so I can buy or not. I have used them in a pinch. What are your plugs burning like? You might want to echeck the compression on 3 & 4. Sounds like you may have a vacuum leak if the ompression is comparable to 1& 2. --- Gerald Livingston <gerald.tcb@xxxxxxxxxxxxx> wrote: Has anybody stuck AutoLite plugs in their bus in a pinch? (AutoLite 425) Time sensitive, need to know before 8pm if they are absolutely horrible. I can order 7902's online later and just use these for testing now. Got the points set and the dizzy back in. Hard to start. Figured it might be that I was adjusting the carb with the points a little off but ... Pull the 3 or 4 plug wire off the cap and there is no effect on the engine rpm at all once I get it started. Good strong spark at the cap end (jumps over at least a 1/4" gap) but I guess the plug end is bad. Pulling 1 or 2 drops rpm and kills the motor if I leave them off more than a few revs. I need a set of test plugs and nobody stocks anything that crosses to a Bosch 7902 except the AutoLite 425. G2