FAT DOWN LOW AND LEAN ON TOP

[txplayboy001]

Rich at idle and low speed, almost loading up. Detonation top end. I pulled some timing out of it but no difference. There is no steady ck engine light. I only get the ck engine light on cold mornings and it is intermittant. Under throttle it comes on, when I let off it goes off. HMM I am thinking o2. Any ideas, without going to the shop and spending $$$.
Thanks

 

[txplayboy001]

Any thoughts yet?

 

[88GT17MA]

Is your engine N/A? whats your setup like......

 

[txplayboy001]

bone stock ,with a K&N. New distributor, new plugs, new filters, clean trottle body, no vaccum leaks, new wires, new blaster coil. Everything else under the hood is original.

 

[88GT17MA]

Ya I would check those 02's, are your cats still on the car? I would check those out to.......do you know what your fuel pressure is at? I would put some higher octane gas in their until you figure it out if you haven't already. It may help some of that detonation your having.

 

[txplayboy001]

ok, cats are comming off, next week. Running 93 octane and I pulled some timing out of it. Still lean. So, I will take care of the cats, then o2, then adjustable feul pressure regulator.