TBIThrottle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
The 100K ohm knock sensor is the correct one for your ECM
Yeap, the new KS from NAPA (was already there for a lift pump, air & fuel filters for the CTD) rang out at 100K ohms also...
Quote:
Originally Posted by RBob
The 16052401 knock filter is HKR which was used on 4.3l and 5.7l engines in cars, trucks and vans. (4" bore).
HKR
Quote:
Originally Posted by RFmaster
Agree
The part numbers I have listed were from 350 CID list of parts - sorry. IRC AMC 304 has 3.75"x3.44" bore x stroke compared to SBC 305 3.736" x 3.48" bore x stroke.
305 specific KS 1997562 used on just about all 5.0L 80's cars (and matching ESC module) should do the trick.
So, the consensus is to swap to 305 ESC & KS due to closer "harmonic" properties?
This ad is not displayed to registered members. Register your free account today and become a member on ThirdGen!
Sponsored Links
Registered users do not see this ad. Click here to register for free!
Dave
HKR refers to 3-4 letter code found on a label attached to the ESC module. There are other codes. I do not have reference material indicating how these letter codes are used (application specific?).
So, the consensus is to swap to 305 ESC & KS due to closer "harmonic" properties?
HKM is the filter for a 305.
As for the dtc 43 on the WOT up hill run. Need to see if it is from the forced knock test failing or from run-away knock. Of course run-away knock can also be caused by false knock.
As for the dtc 43 on the WOT up hill run. Need to see if it is from the forced knock test failing or from run-away knock. Of course run-away knock can also be caused by false knock.
When does the forced knock test actually run?
Start-up only?
Some other interval?
Quote:
Originally Posted by RBob
What does a data log show for knock?
(logs posted previously in zip file)
NONE! I usually had a few knock counts at startup & while running, but since setting the base timing back to 0* from 7*-8* have seen no knock counts. My very limited knowledge leads me to think there are several possibilities why:
1) Bad ESC/KS/wiring... Except, wouldn't the 43 likely be thrown at startup if the ESC wasn't seeing the correct voltages or the KS, right? Plus, the wires have been rang, ohm'd, & key-on/running voltages checked on numerous occasions (w/ engine both cold & hot). I have another 5.7 ESC I could drop in for testing, but haven't at this point?
2) I need more advance (either bumping the base or programming the SA tables)... like the forced knock test is calling for max timing (where is this specified? Bin? ECM logic?) and that's still not enough to cause it to ping and the ESC is throwing the 43?
What is the difference in the HKM and the ANRZ ESC both used with the 5.0 engine?
I have found this chart with only have the part numbers not the letter codes identified. Can you identify the letter codes with this ESC/KS chart?
As I can only find one part number for the 5.0 ESC I an trying to determine which ESC, HKM or ANRZ is part number 160523491? I have several ESC's with only part numbers, no paper label letter codes. I believe the 5.7 ESC's have letter codes of ANVC and HKR also.
Is there a better chart for identifying ESC/KS for the 1227747 ECM including letter codes? I can't seem to find one.
For the WOT forced knock test the engine also needs to be up to temperature. If the 1st attempt to force knock fails the ECM will try at the next WOT. If that one also fails code 43 is tossed. If either passes then it is not run again until the next key-on.
So hypthetically, if the forced knock test advances the timing until it receives a knock, but doesn't get a knock (because the timing isn't advancing enough to make my AMC engine ping?), that could cause the test to fail... throwing the 43 flag?
So hypthetically, if the forced knock test advances the timing until it receives a knock, but doesn't get a knock (because the timing isn't advancing enough to make my AMC engine ping?), that could cause the test to fail... throwing the 43 flag?
Yes, exactly. Also, recall that the TBI L01/L05 swirl port heads are extremely knock sensitive. So for the most part the test works on those engines (this test can be defeated by other means, such as high octane fuel).
Now use this "forced knock" test on an engine with different heads, that are not so knock sensitive. And what happens? No knock, test fails, 8 degrees (or there-abouts, cal dependent) of timing is pulled. And code 43 is tossed. Stupid.
I have posted a patch to bypass this [stupid] test. Well worth while to use it. Try the DIY_PROM board, it should be there (someplace?).
Did I mention that I think this test is stupid?
Of course, on the other hand (OTOH), during the WOT pull up the hill, can you hear the engine ping? If so, then there is an issue with the ESC system.
To be completely honest, with no top or doors (wind noise) plus semi-unbalanced bias ply Swampers (lot's of tire whine), I can barely hear the engine pulling that hill much less pinging!
This system performs a functional check once per start-up to check the ESC system. To perform this test, the ECM will advance the spark when coolant is above 95~C and at a high load condition (near W.O.T.). The ECM then checks the signal at "B7" to see if a knock is detected. The functional check is performed once per start-up and if knock is detected when coolant is below 95~C (194~F), the test has passed and the functional check will not be run. If the functional check fails, the "Service Engine Soon" light will remain "ON" until ignition is turned "OFF" or until a knock signal is detected.
Please correct me if I'm wrong, but this means if knock occurs AFTER startup *and* BEFORE 195*F... the ECM is done with testing? If so, I believe there must have been something loose on Saturdays run that didn't show the knocks at startup? Not sure why the 43 flag set, because if it was the knock test, the temp was below 195*F even though the TPS registered 90%+ on the hill... circumstancial?
I got home and double checked everything, confirmed that I could see knock counts by tapping on the block & the connections. Decided on a short (20 min) logging run before supper... I started the logging prior to start (engine was slightly warm after above testing) and pretty much went WOT on every stop! I got knocks now!
Last edited by Caver Dave; 04-28-2009 at 07:43 PM.
OK, last run of the evening... what's weird is the VSS 24 flag did NOT set earlier, but looks like it set as soon as the engine fired this time! Not a huge deal, since it's enabled in the bun & I don't have it, but still
To be completely honest, with no top or doors (wind noise) plus semi-unbalanced bias ply Swampers (lot's of tire whine), I can barely hear the engine pulling that hill much less pinging!
Please correct me if I'm wrong, but this means if knock occurs AFTER startup *and* BEFORE 195*F... the ECM is done with testing? If so, I believe there must have been something loose on Saturdays run that didn't show the knocks at startup? Not sure why the 43 flag set, because if it was the knock test, the temp was below 195*F even though the TPS registered 90%+ on the hill... circumstancial?
I'm not going to confirm or deny any of the above.
WHY? Simple, what ECM/MaskID are they talking about??
If you want to pin down an answer to a question to this degree, then both the MaskID and BCC are required. Then the person responding to that post needs to do a bunch of research for a pin-point of an answer. Best of luck...
I'm not going to confirm or deny any of the above.
WHY? Simple, what ECM/MaskID are they talking about??
If you want to pin down an answer to a question to this degree, then both the MaskID and BCC are required. Then the person responding to that post needs to do a bunch of research for a pin-point of an answer. Best of luck...
RBob.
I'm following you bro.
What should be expected "forced knock test" wise for my 1227747/$42/ARPC?
