OK Update time and question time as well.
I hate how long it takes me to do any thing?
I finely got the van up running, I had to replace the water pump so I when deeper and replaced the timing chain, after all the van has 100K on it. (and a good thing it was a original chain and sloppy, the motor used to shake at 3000 plus now seems very smooth, only less willing to rev there.)
I went with a true roller performance timing set, and after debating with all I could find went with 4 digress advance.
Things seemed to work fine.
With the stock chip I seem to have more lower end off line power.
As I am still testing, I switched to a mileage tuned chip with power settings as well, and things looked good, but mileage?Gas mileage is down, I am getting readings of from 10 to 13 MPG down from the old readings of 16 to 18 MPG. (And very sadly not the 20 + I was hoping for?)
I have switched back to the stock chip and am hoping for better MPG.
The big question is: DID I mess things up advancing the cam?? Does/will advance a stock ?93 truck 350 cam cause such a drop in gas mileage??
All mileage test runs have been a run of around 60 miles range at around 70 MPH.
Another problem is either lack of fuel or that cam again?I can rev in first gear to 4500 and 5000 RPM smartly, and second does almost as well, but in third it seems to strain and almost hang up at 3000 plus and has a hard time going any higher, of course at this point I am hitting 80MPH so can not press on much longer.
So if it can rev to 5000 in first gear pulling the van, is things working normally?? I feel and know the gearing causes that drop in power in higher gears but from what I remember of drivng it last year it seems smother but straining more to rev.