A couple weeks ago I was making my way back from Fort Myers across Alligator Alley in something like 94 degrees and 85% humidity, doing anywhere from 80 to 100mph. The speed limit is 70 and if I had a long clear line of sight, I'd move up to 100 or so for a bit and then let off the gas when approaching a small hill or raised area when my sight stopped, drifting back to 80. This was in 6th gear the whole time but at those speeds the rpms never got much below about 3k so when I reapplied some gas coming over the little hill, I don't believe I was lugging the motor or anything.
After about 30 minutes, the Beast began sort of bucking, or stuttering, when I got back on the gas. So I kept it even after that just setting the cruise at 80 to make sure I got home ok. When exiting the highway, it was the same thing getting on the gas in lower gears - it seemed to stutter and stumble at lower rpm's but smooth out around 3k.
At first there was no SES light but the next day (another scorcher here in SoFlo) I experienced some more of the same and *bingo* the SES came on. I ran my Peake and found the following codes:
Table 18, AA AF AE 91 90
Looking them up and doing some Search on here seemed to indicate that some of those may be triggered by things other than the CPS, etc. My oil separators and hoses are the OE on this Beast and with 117k, I had a strong suspicion that I should have gotten around to that preventive maintenance when I first intended to. Sure enough, the hoses were very, very squishy and soft.
At any rate, to wrap up this rambling: I ordered new hoses and put them on, cleaning the oil separators with throttle body spray at the same time. There was a good amount of oily brown fluid running out of them when I sprayed the cleaner in there. Once it seemed to be clear, I set them aside and came back later for a little more spray...only to find it still seemed dirty. So I am not 100% convinced that my cleaning was good enough - might as well order up some new ones and not have to worry about it anymore. Also, one of the gaskets that goes into the intake plenum is torn in that about half of the ribbed part has separated from the "outside the plenum" part. I'm assuming that definitely needs to be replaced?
I cleared those codes and they haven't come back since...nor has the stuttering, despite incredibly hot days here lately. So even though the hoses didn't seem to have visible cracks/leaks in them, there must be something to the whole "squishy hoses are collapsing and constricting airflow" thing.
Hope this helps anyone who might search on those error codes or whatever.
Cheers,
SP
After about 30 minutes, the Beast began sort of bucking, or stuttering, when I got back on the gas. So I kept it even after that just setting the cruise at 80 to make sure I got home ok. When exiting the highway, it was the same thing getting on the gas in lower gears - it seemed to stutter and stumble at lower rpm's but smooth out around 3k.
At first there was no SES light but the next day (another scorcher here in SoFlo) I experienced some more of the same and *bingo* the SES came on. I ran my Peake and found the following codes:
Table 18, AA AF AE 91 90
Looking them up and doing some Search on here seemed to indicate that some of those may be triggered by things other than the CPS, etc. My oil separators and hoses are the OE on this Beast and with 117k, I had a strong suspicion that I should have gotten around to that preventive maintenance when I first intended to. Sure enough, the hoses were very, very squishy and soft.
At any rate, to wrap up this rambling: I ordered new hoses and put them on, cleaning the oil separators with throttle body spray at the same time. There was a good amount of oily brown fluid running out of them when I sprayed the cleaner in there. Once it seemed to be clear, I set them aside and came back later for a little more spray...only to find it still seemed dirty. So I am not 100% convinced that my cleaning was good enough - might as well order up some new ones and not have to worry about it anymore. Also, one of the gaskets that goes into the intake plenum is torn in that about half of the ribbed part has separated from the "outside the plenum" part. I'm assuming that definitely needs to be replaced?
I cleared those codes and they haven't come back since...nor has the stuttering, despite incredibly hot days here lately. So even though the hoses didn't seem to have visible cracks/leaks in them, there must be something to the whole "squishy hoses are collapsing and constricting airflow" thing.
Hope this helps anyone who might search on those error codes or whatever.
Cheers,
SP
