Only getting 20 MPG?

[denguy]

Gas leak?

[RhodeStiva]

Gas leak?

Nope

[RhodeStiva]

Before it was at 3000 rpm now after timing fix it is at 2500.

[Prafeston]

Well that should help!

[Movin]

1+1=3 ?

[RhodeStiva]

1+1=3 ?

sure

[zoom zoom]

What's idle rpm?

[RhodeStiva]

800-900

[htchbck]

Before it was at 3000 rpm now after timing fix it is at 2500.

What was at 3000RPM? It was running 3k at 65, now its running 2.5k at 65? That doesn't add up unless you changed tires, trans, or your clutch was slipping before...

[RhodeStiva]

What was at 3000RPM? It was running 3k at 65, now its running 2.5k at 65? That doesn't add up unless you changed tires, trans, or your clutch was slipping before...

yes and i changed my timing it was off a tooth.

[zoom zoom]

I bet your timing is still out, mine gets really bad milage when the distributor isn't set right...like it is now. I'm tempted to take my next $70 to a garage and have them guys do it to see how far off I am.

[htchbck]

yes and i changed my timing it was off a tooth.

So you changed tires? That will definitely help with highway mileage if its giving you a lower cruising RPM. From reading that it sounded like the only thing you had changed was timing, which shouldn't affect cruising rpms at all, just idle.

[Zanzer]

I bet your timing is still out, mine gets really bad milage when the distributor isn't set right...like it is now. I'm tempted to take my next $70 to a garage and have them guys do it to see how far off I am.

$70 will buy you a pretty nice timing light...just saying

[FestYboy]

Before it was at 3000 rpm now after timing fix it is at 2500.

what you're describing is not possible without changing a gear ratio. timing wont change engine RPM for a given gear and speed, and tires won't change it THAT much (16.7%). something else is suspect there.

[Movin]

It doesn't add up, I'm with Arty and htch on that one, fixing the timing will help power and mileage, changing to a larger tire can change mileage either way, depends on tire and that could change the tach and speedo readings altho the speedo is suspect until GPS verified. The mpg and odo are suspect until the odo is verified.