Answers
Jan 16, 2024 - 07:10 PM
It is most likely the fuel injectors. If you want to take care of it yourself I would start by using a fuel injector cleaner for dirty injectors, check the spark plug and ignition coil for cylinder 5, look for vacuum leaks in the manifold and hoses, and have the fuel injector for cylinder 5 checked or cleaned by a mechanic if that doesn't solve the issue. That's what i would do before trying to replace or rebuild the whole engine
Jan 17, 2024 - 03:27 AM
Hang on there, fellow 4Runner fanatic!
Hold off on the engine eulogy just yet – that ol' rig has plenty of fight left in it, I reckon. Let's dive into that pesky P0305 code and see if we can get your trusty steed running smoothly again.
First off, you've already tackled a bunch of the usual suspects – new plugs, wires, filters, O2 sensors, even a good fuel system cleaning with the BG44K. That's some serious wrenching right there! But a 305 code, which points to a cylinder 5 misfire, can be a tricky critter.
Here's my two cents based on your situation:
1) Dirty injector: You're right, a clogged injector could definitely be the culprit. The BG44K might be helping temporarily, but a proper cleaning or even replacement could be the key.
2) Vacuum leak: An air leak somewhere around cylinder 5 can also cause a misfire. Check for loose hoses or cracks in the intake manifold.
3) Ignition coil: Even though you replaced the wires, the coil itself could be on its last legs, especially with that mileage. Swapping it out might do the trick.
4) Compression: While 75-90 psi isn't bad for that many miles, a slight difference between cylinders could contribute to the misfire. A leak-down test might reveal more details.
Before throwing in the towel on the engine, I'd suggest:
You may need some parts in the process, click this link to be directed to our website where your vehicle information has already been entered. Simply enter the part's name into the search field to get started.
And hey, if you do end up needing a rebuild or a new engine, that's okay too! With the TLC you've given it, that 4Runner has definitely earned its retirement. But based on its past performance, I wouldn't count it out just yet. Keep on wrenchin', and good luck!
Hold off on the engine eulogy just yet – that ol' rig has plenty of fight left in it, I reckon. Let's dive into that pesky P0305 code and see if we can get your trusty steed running smoothly again.
First off, you've already tackled a bunch of the usual suspects – new plugs, wires, filters, O2 sensors, even a good fuel system cleaning with the BG44K. That's some serious wrenching right there! But a 305 code, which points to a cylinder 5 misfire, can be a tricky critter.
Here's my two cents based on your situation:
1) Dirty injector: You're right, a clogged injector could definitely be the culprit. The BG44K might be helping temporarily, but a proper cleaning or even replacement could be the key.
2) Vacuum leak: An air leak somewhere around cylinder 5 can also cause a misfire. Check for loose hoses or cracks in the intake manifold.
3) Ignition coil: Even though you replaced the wires, the coil itself could be on its last legs, especially with that mileage. Swapping it out might do the trick.
4) Compression: While 75-90 psi isn't bad for that many miles, a slight difference between cylinders could contribute to the misfire. A leak-down test might reveal more details.
Before throwing in the towel on the engine, I'd suggest:
- Targeted cleaning: Take a look at specific injector cleaning services, some shops even have ultrasonic cleaning options.
- Coil swap: Replacing the coil on cylinder 5 is a relatively affordable test.
- Smoke test: This can help pinpoint any sneaky vacuum leaks around the intake.
- Leak-down test: This will give you a clearer picture of the individual cylinder's health.
You may need some parts in the process, click this link to be directed to our website where your vehicle information has already been entered. Simply enter the part's name into the search field to get started.
And hey, if you do end up needing a rebuild or a new engine, that's okay too! With the TLC you've given it, that 4Runner has definitely earned its retirement. But based on its past performance, I wouldn't count it out just yet. Keep on wrenchin', and good luck!
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