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The newer Sienna that had the 10.8:1 compression was. A new van off the carrier had a check engine light on, and the crank timing pulley was damaged and needed to be removed. Anyway, it was interference. It is still an easy change.

See the pattern here? :) Take it apart and post the what you find. Then we all learn.

Check to see if you are getting spark, that is the easiest. Air/fuel ratio, spark timing, and compression are the three parts to the combustion triangle.

The price is whatever somebody is willing to pay. There isnt a too high or too low. You dont like the price, well you dont buy it. Just like gas.

Neither is wrong. I added to his answer.

What are the actual readings from the test?

91 Turbo with A340E, about 23 mph on a tank. Of course, mileage will vary greatly with how you drive. City is a little lower than highway. All of my old 7MGE's also picked up about 22-24 mpg, on a tank. Always mostly stock, never changed ratios. The tank is 18.5 gallons, all of them. A dozen...

The trans ECU recieves input from the engine ECU to make shift timing decisions. The 91 and 92 are the two best.

The A340E was used behind all RWD high output powerplants. Or its cousins, like the A341, and A342. Specifically yes, there are differences. Even internally, the clutch packs were upgraded for more holding power. If the parts counter searched under your VIN, then the part that doesnt fit is...

Any trans no matter how bad ass can be ruined. Ive been in the trans shop picking up parts and have seen the almight T56 torn down and f-ed up. And others for sale that needed rebuilt.

Perhaps he means how the signal is lower that what it should be, so timing is incorrect. I dont see anything in your report about cooling. As you partially indicated, a BHG isnt something that just happens, it is a side effect of something else wrong. The soft head, or overheating, even if...

Nice informative thread.

The "beware of rocket scientist is not from Larson, just the drawing. Clowns at work did that long before my arrival.

You know you're an N/A owner when... you know this is funny.

DTC is just diagnostic trouble code. The converter can lock up before O/D(4th). A locked up converter would make the car stall at low speed. You have transmission trouble. I havent driven it, so it is a little tough to say.

And the Borg Warner T5 is not as durable as the R154. In fact, it is on par with the W58. What it does have is a .68 overdrive. :)

Variable cam timing should help.

Shift forks are inside the transmssion. Get a buddy who has pulled a trans before.

I remember reading the test mule had 12:1 compression and ran on pump gas, no VVT either.

Non-words are also annoying. Irregardless and alot come to mind. The opposite of a little is a lot. Not alot. Regardless means either way. So if irregardless was a word, it would mean only one way possible. The list of internet slang is too long to deal with it. I'm not a grammar major either...