Fuel Injectors
After having the exact same problem as the OP found here:
http://www.toyota-4runner.org/3rd-g...6-misfire-fixed-fuel-injector-99-4runner.html
I realized I now need to go after the injectors since coil packs and cables were replaced. My CEL code was P0171 and P304.
And replace the Fuel Filter (Autozone)- aside from dealing with the fuel spilling out- it was straight forward.
The swap is all straight forward unless you run into the issue I had. 3 injectors broke. Now the plan was to change out #2,4,6 and do the other 3 at a later date. But 2 and 6 broke while in the chamber and 5 broke when trying to free the fuel rail. Thank goodness I had an old spare. I cleaned the 3 remaining "good" old ones and put in the 1,3,5 side.
Heres a pic showing where the brittle plastic failed after 210K miles.
The pic shows the body with a port still attatched and a broken port lying next to it (I was pretty freaked out and realized this is the only photo I took while in the middle of process)
Heres how I got it out of the chamber:
3 inch drywall screw threaded down into one of the holes (there are 2) of the plastic piece. Spry PB blast and wiggle the drywall screw. Wait, spray, wiggle. After a while PULL!!!
Be sure to order 2 intake gaskets for the plenum. I found a small leak in the lower plenum gasket between cylinders 1+2. Notice the black and oxidation in the photo below:
I cleaned all surfaces off from the old gasket and re-installed all
Now if you've followed along, the bad injector that started this snowball effect is still in their. No shops had any in stock. That's another day- SOON!
However, here's a question for any experts (please PM me):
Can I swap out 1,3,5 injectors with out removing the plenum AND not disturb the other side (i.e. remove the left fuel rail only)? It seemed like the metal tube at the front is rigid and not removable.
Much thanks.
After having the exact same problem as the OP found here:
http://www.toyota-4runner.org/3rd-g...6-misfire-fixed-fuel-injector-99-4runner.html
I realized I now need to go after the injectors since coil packs and cables were replaced. My CEL code was P0171 and P304.
And replace the Fuel Filter (Autozone)- aside from dealing with the fuel spilling out- it was straight forward.
The swap is all straight forward unless you run into the issue I had. 3 injectors broke. Now the plan was to change out #2,4,6 and do the other 3 at a later date. But 2 and 6 broke while in the chamber and 5 broke when trying to free the fuel rail. Thank goodness I had an old spare. I cleaned the 3 remaining "good" old ones and put in the 1,3,5 side.
Heres a pic showing where the brittle plastic failed after 210K miles.
The pic shows the body with a port still attatched and a broken port lying next to it (I was pretty freaked out and realized this is the only photo I took while in the middle of process)
Heres how I got it out of the chamber:
3 inch drywall screw threaded down into one of the holes (there are 2) of the plastic piece. Spry PB blast and wiggle the drywall screw. Wait, spray, wiggle. After a while PULL!!!
Be sure to order 2 intake gaskets for the plenum. I found a small leak in the lower plenum gasket between cylinders 1+2. Notice the black and oxidation in the photo below:
I cleaned all surfaces off from the old gasket and re-installed all
Now if you've followed along, the bad injector that started this snowball effect is still in their. No shops had any in stock. That's another day- SOON!
However, here's a question for any experts (please PM me):
Can I swap out 1,3,5 injectors with out removing the plenum AND not disturb the other side (i.e. remove the left fuel rail only)? It seemed like the metal tube at the front is rigid and not removable.
Much thanks.
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