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Old 12-03-2017, 01:39 PM   #100 (permalink)
Stubby79
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Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,747

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

Little Boy Blue - '05 Toyota Echo
90 day: 33.35 mpg (US)

BlueZ - '19 Nissan 370Z Sport
90 day: 17.19 mpg (US)
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Quote:
Originally Posted by MetroMPG View Post


It's in, buttoned up & runs great!

I love the character the XFi cam gives the engine. 5th gear is usable for cruising at around-town speeds now, where the engine wouldn't have been happy doing it before.

One thing I didin't recall from the first time I did this swap:

The engine did NOT want to start afterward. The first 3 times I turned the key, it spun really fast, almost as though there was no compression.

The 4th time it caught, but ran really rough -- was sure I must have jumped a cog on the crank gear when I was messing with the timing belt.

The 5th time, it ran less rough, then smoothed out after about 30 seconds.

I wonder if the lifters were messed up from being depressurized?

Maybe the fast spinning at first wasn't a lack of compression (obviously), but with if no valves were opening at first, the cylinders were just being air springs?
I did the same thing. Drove me nuts, thinking I screwed the whole thing up!

I posted on GMF...immediate answer was that my lifters had extended up without the camshaft to hold them down, and basically over-filled themselves hydraulically. Just had to wait for them to bleed back down to normal.

Oops! Should have thought of that!
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