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Toyota 4Runner Forum - Largest 4Runner Forum(https://www.toyota-4runner.org/)
- 4th Gen T4Rs(https://www.toyota-4runner.org/4th-gen-t4rs/)
- - Secondary Air Injection Pump Failure on V8's! Important!(https://www.toyota-4runner.org/4th-gen-t4rs/174030-secondary-air-injection-pump-failure-v8s-important.html)
| slyfox75 | 11-24-2021 03:58 PM |
Quote:
Originally Posted by jibskib(Post 3690939)
Edit/update to above post: 1441/1444 codes. Also 0430 but hopefully better after clearing 144- and bypass?
Supposed to be leaving tonight. Do I need to rent a car for my trip?
So.....if the valves are open per the codes, you are most likely going to go back into limp mode.....until you get the bypass and plates installed.
You should be able to test this locally though before you get on the road for the long trip. I would drive around town, get up to 65-70 for 5+ minutes and you will know pretty quick if its going to go into limp. Its odd they BOTH came on at exact same time.
Anyone reading.....PLEASE do yourself a favor and bypass BEFORE you end up like this guy. I cant tell you how many folks have ruined trips/vacations/holidays because these things for whatever reason seem to hit on the most inconvenient times.
| slyfox75 | 11-24-2021 04:01 PM |
And Limp is caused by a backflow of exhaust gas to some pressure sensors on the manifold area. Thus we use plates to block that flow. Bypass alone wont fix limp. And yes the "system" wont come on under 40F or so but the "system" doesn't include those pressure sensors. So you may start up fine.....but limp is still possible.
| keneko | 11-24-2021 04:15 PM |
Quote:
Originally Posted by slyfox75(Post 3690969)
So.....if the valves are open per the codes, you are most likely going to go back into limp mode.....until you get the bypass and plates installed.
You should be able to test this locally though before you get on the road for the long trip. I would drive around town, get up to 65-70 for 5+ minutes and you will know pretty quick if its going to go into limp. Its odd they BOTH came on at exact same time.
Anyone reading.....PLEASE do yourself a favor and bypass BEFORE you end up like this guy. I cant tell you how many folks have ruined trips/vacations/holidays because these things for whatever reason seem to hit on the most inconvenient times.
is this something that is pretty much guaranteed to happen to the v8's? i just purchased an '03 V8 with 165k on the clock. so far no issues and i'd like to keep it at that
| slyfox75 | 11-24-2021 08:14 PM |
Quote:
Originally Posted by keneko(Post 3690975)
is this something that is pretty much guaranteed to happen to the v8's? i just purchased an '03 V8 with 165k on the clock. so far no issues and i'd like to keep it at that
2005 and up. Specific to 2UZ FE VVTI equipped engines.
| keneko | 11-24-2021 11:24 PM |
Oh awesome thats rather reassuring. Knew I picked a good year 😎
| vr4z06gt | 01-12-2022 09:34 PM |
I ended up replacing the pump and secondary air injection control valve. This didn't take too long, maybe 2 hours start to finish. Parts cost was ~$300 (dorman pump and valve + OEM gaskets). I didn't replace the check valves as I could see the vanes missing from the pump head and intake cleaner foam didn't make it past the intake of the injection valve. Replacing the check valves appeared to by far the worst of the job, if I were to replace everything as suggested by most posts. I am sure the aftermarket bypass kits would work just fine but for the price and relative ease I figured replacing the defective parts would be easier than try to defeat the system and having to deal with it later (replace again, emissions test, sell the truck).
| MarkJ65 | 06-19-2022 11:40 AM |
Quote:
Originally Posted by dedlewamp(Post 3666099)
I've had the slyfox kit installed in my '08 now for over a year, and out of the blue now I'm getting a P011B error code, which of course makes the dash light up with traction and VSC lights.
I believe it's throwing the error, due to the difference between the IAT and the coolant temperature. Weird though it hasn't caused me any issues for over an year now.
Any thoughts, I know there was discussion on '08's potentially having differences in the ECU or hardware.
Did you get a resolution on this?
I have experiencing the same problem
Please let me know - markjobe@gmail.com
| JoshuaHufford | 07-11-2022 03:45 PM |
Quick question for those of you who have installed the bypass kit from Jeff. I installed the kit on mine a couple years ago and it fixed the problem.
I'm probably going to have to take my 07 V8 to a mechanic for another problem and I want to be up front with the mechanic when I take it in so they aren't looking at the extra wire and wondering what it is. How do you explain this modification and did they take it? Did it cause any problems?
Thanks!
| dedlewamp | 07-22-2022 09:35 PM |
Quote:
Originally Posted by MarkJ65(Post 3741770)
Did you get a resolution on this?
I have experiencing the same problem
Please let me know - markjobe@gmail.com
Hey Mark
I believe the culprit for my code was due to a poor crimp on one of the connections. When I was inspecting everything, one of the wires, I believe it was the 12v positive, was broken and causing intermittent power to the relay.
I've rewired the connections with a proper solder and heat shrink terminal, and haven't had an error code since. Feel free to message me if you have questions!
| _BMC_ | 09-02-2022 05:19 PM |
Hey all,
I've had the Hewitt kit installed for a few years now with zero issues until just the other week.
I keep getting P0113 code, IAT error code.
Took it to my local Toyo Tech guys here in Atlanta this morning and they think it might be an issue with the bypass kit causing the error.
I have about 175k on the motor and no issues until recently as noted above.
I've also seen talk about the factory wiring crimps being weak over time and causing the issue.
Could my MAF actually be bad or is it more likely that there's a short in the factory loom or in the Hewitt kit?
I've cleaned both the MAF with electrical cleaner as well as all the connectors.
I'd rather not drop the money on a new bypass kit or MAF but I also don't know what to look for in terms of bad connections on the loom. The thread I read wasn't clear about what connectors were bad.
TIA,
Brian
| AuSeeker | 09-02-2022 07:02 PM |
Quote:
Originally Posted by _BMC_(Post 3756936)
Hey all,
I've had the Hewitt kit installed for a few years now with zero issues until just the other week.
I keep getting P0113 code, IAT error code.
Took it to my local Toyo Tech guys here in Atlanta this morning and they think it might be an issue with the bypass kit causing the error.
I have about 175k on the motor and no issues until recently as noted above.
I've also seen talk about the factory wiring crimps being weak over time and causing the issue.
Could my MAF actually be bad or is it more likely that there's a short in the factory loom or in the Hewitt kit?
I've cleaned both the MAF with electrical cleaner as well as all the connectors.
I'd rather not drop the money on a new bypass kit or MAF but I also don't know what to look for in terms of bad connections on the loom. The thread I read wasn't clear about what connectors were bad.
TIA,
Brian
Just an FYI, you need to only use "MAF cleaner" to clean the MAF sensor, using anything else can damage the sensor!!
| slyfox75 | 09-02-2022 07:33 PM |
Quote:
Originally Posted by _BMC_(Post 3756936)
Hey all,
I've had the Hewitt kit installed for a few years now with zero issues until just the other week.
I keep getting P0113 code, IAT error code.
Took it to my local Toyo Tech guys here in Atlanta this morning and they think it might be an issue with the bypass kit causing the error.
I have about 175k on the motor and no issues until recently as noted above.
I've also seen talk about the factory wiring crimps being weak over time and causing the issue.
Could my MAF actually be bad or is it more likely that there's a short in the factory loom or in the Hewitt kit?
I've cleaned both the MAF with electrical cleaner as well as all the connectors.
I'd rather not drop the money on a new bypass kit or MAF but I also don't know what to look for in terms of bad connections on the loom. The thread I read wasn't clear about what connectors were bad.
TIA,
Brian
Do you have the truck or it's at the mechanic? Easy test. Warm up the truck. Remove/unwire the bypass. Stop and clear codes(battery or scanner methods). With engine still hot and truck "back like stock"(no bypass) start it up. See if you get 0113. If you do......its not the bypass.
| _BMC_ | 09-03-2022 08:42 PM |
Quote:
Originally Posted by slyfox75(Post 3756965)
Do you have the truck or it's at the mechanic? Easy test. Warm up the truck. Remove/unwire the bypass. Stop and clear codes(battery or scanner methods). With engine still hot and truck "back like stock"(no bypass) start it up. See if you get 0113. If you do......its not the bypass.
Thanks! Yes, I have the truck back. I'll give that shot tomorrow and follow up with results.
| _BMC_ | 09-05-2022 03:00 PM |
Quote:
Originally Posted by slyfox75(Post 3756965)
Do you have the truck or it's at the mechanic? Easy test. Warm up the truck. Remove/unwire the bypass. Stop and clear codes(battery or scanner methods). With engine still hot and truck "back like stock"(no bypass) start it up. See if you get 0113. If you do......its not the bypass.
Turns out I must have an older version of the kit as it is all tapped into the original wiring harness. It's not the plug and play version so I can't easily disconnect the bypass and try your suggestion... :(
| Shiftless Joe | 09-05-2022 03:40 PM |
Quote:
Originally Posted by _BMC_(Post 3756936)
Hey all,
I've had the Hewitt kit installed for a few years now with zero issues until just the other week.
I keep getting P0113 code, IAT error code.
Took it to my local Toyo Tech guys here in Atlanta this morning and they think it might be an issue with the bypass kit causing the error.
I have about 175k on the motor and no issues until recently as noted above.
I've also seen talk about the factory wiring crimps being weak over time and causing the issue.
Could my MAF actually be bad or is it more likely that there's a short in the factory loom or in the Hewitt kit?
I've cleaned both the MAF with electrical cleaner as well as all the connectors.
I'd rather not drop the money on a new bypass kit or MAF but I also don't know what to look for in terms of bad connections on the loom. The thread I read wasn't clear about what connectors were bad.
TIA,
Brian
Sounds like the road I went down, and my vehicle would randomly shutdown while turning or stopping, and/or throw MAF codes. Tried new MAF's and cleaned the TB, it still randomly died, sometimes throwing a code, sometimes not.
I decided to unplug my Hewitt Tech as a last resort, and haven't had an issue in over 6 months. I left it mounted in the engine bay just in case a smog pump fails away from home.
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