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'87 22RE blowing smoke on acceleration

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'87 22RE blowing smoke on acceleration

Old 01-08-2019, 06:11 PM
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'87 22RE blowing smoke on acceleration

Went out today on a dirt road excursion in my '87 4Runner to see the remains of our high desert snow.

My rebuilt engine with about 4,000 miles on it started blowing substantial smoke on acceleration and backfiring slightly on deceleration. Still seemed to run strong as ever.

Fuel mileage has been around 22mpg. Has used less than 1/4 quart of oil in the last 2,000 miles. Oil still honey colored-not black Castrol GTX 10-30

Got home and began troubleshooting:

Timing @ 5-6 BTDC jumpered and about 12 BTDC unjumpered== normal Plugs 1-2 and 4 light colored and normal for 4,000 miles service. # 3 sooty black and somewhat oily.

Compression test shows all 4 cylinders @ 165-170psi

Guess I'm gonna change out the fuel injectors next and see what happens. I don't have a known good one to change out #3, so I'll just get a set of 4 and change them all.

Don't know what else to do. I guess there could be some FUBAR with #3 piston rings or #3 valve seals, but this issue has developed suddenly and compression is still spot on.

Will take a few days to secure alternate injectors. Stay tuned......

Last edited by millball; 01-08-2019 at 06:44 PM.
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Old 01-10-2019, 12:40 PM
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What color smoke? If white, even after reaching op temp, prob good to check coolant levels for loss and/or contamination.

Block test seems to be another useful tool, if a possible crack in the head but below the HG...

Any codes during diag check? Might be too soon to tell...
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Old 01-10-2019, 03:29 PM
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Originally Posted by 75w90mantraN View Post
What color smoke? If white, even after reaching op temp, prob good to check coolant levels for loss and/or contamination.

Block test seems to be another useful tool, if a possible crack in the head but below the HG...

Any codes during diag check? Might be too soon to tell...
Smoke gray/white on acceleration, blackish on decel. No apparent contamination, or loss of coolant.

No check engine light, but have not checked for stored codes.

Still runs strong and idles well.

My gut feeling is that a fuel injector/injectors will settle it. And a new O2 sensor just because I got a couple NTK spares cheap and the installed one is some knock-off.

Should have injectors tomorrow, or monday latest.
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Old 01-10-2019, 03:40 PM
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My gut says injector or non firing plug. What wires cap/rotor and plugs are you running?
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Old 01-10-2019, 03:57 PM
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Originally Posted by thefishguy77 View Post
My gut says injector or non firing plug. What wires cap/rotor and plugs are you running?
YEC brand Japanese made cap and rotor. Genuine Toyota plug wires Denso W16EXR-U plugs.

All new with new engine 4,000 miles ago.
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Old 01-10-2019, 04:23 PM
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Injector is my guess then. I hate guessing on stuff.
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