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Im still chasing my hard cold starts and occasional stall on cold start. Recently I tried starting cold with the maf disconnected and didn't get the hard start or stall after start so I'm "assuming" I have a bad maf. It only does it on the first cold start of the day and I'm not sure if it can be contributed to the stalling while driving issues I've had recently.
Can anyone shed some light on why this replacement offered by rock auto has bosch cover on the bottom ?
Anyone know if this BSE branded one is actually a reman Bosch?
Also the Delphi that is on rock autos site for the tpi doesn't appear to have the wire element inside it like the Bosch units. Will that cause issues ?
I've read too many bad stories about after market mafs and don't want to pay for one that isn't going to help me.
Last edited by Vader; 12-24-2023 at 01:42 PM.
Reason: Text resize
I hope you don't mind, but the code was cleaned up to reduce the font size based on your last post. After all, Australia is a big place, worthy of big text.
That "BSE" 57854 unit does look like a reman of an original Bosch unit, but the product description does identify it as a "new" MAF with "enhancements" - whatever that is.
Their 57878 is a TFT version, eliminating the fragile hot wire in lieu of a TFT sensor. If they have done it half as well as the old Wells replacement unit, it's accurate and nearly bullet-proof.
They also list a "Walker" unit which appears to use a thermistor, but specifically mentions that it does NOT include the burn-off function. That is going to be a problem for a 1227165 ECM.
There are a few others listed which are "new" or reman units, and we know that some of the units have recently had calibration issues.
Thanks Vader. Seems like it's still a hit or miss situation with them for me. Rock auto seem to know jack about parts of your lucky enough to get an email back from them, and quite difficult and expensive to return parts to from Australia 😔
I bought a delphi maf a few months ago to replace a older bosch i thought was getting goofy.
Put it in and drove it a while with no issues. Now it has a lean band in a certain rpm range with steady throttle. I can actually feel when its about to happen, and the cel will come on until I tap the throttle a few times then it's fine.
fuel psi is steady, inj fuses are good, tps passes the sweep tests.
just need decent weather and some time off to swap to old maf and retest.
It could also be something else and a huge coincidence
The new mafs from Delphi don't send the right signal at low airflow... You can find this In other threads... They don't go low enough...confirmed with Delphi engineers
A previous owner put a Delphi in my car and I always had starting, stalling issues and occasional codes for high airflow from ecm....
Found an original Bosch unit... Now the car starts and runs sooo much better.... I had to fudge a lot of stuff to get the Delphi unit to work acceptably.... But not great.... It's still best to find a decent original....
I bought a delphi maf a few months ago to replace a older bosch i thought was getting goofy.
Put it in and drove it a while with no issues. Now it has a lean band in a certain rpm range with steady throttle. I can actually feel when its about to happen, and the cel will come on until I tap the throttle a few times then it's fine.
fuel psi is steady, inj fuses are good, tps passes the sweep tests.
just need decent weather and some time off to swap to old maf and retest.
It could also be something else and a huge coincidence
SbF, no part throwing, not my style hence trying to work out what is going on with the different mafs.
"assuming" is down to the fact that the car runs like **** with the maf connected and runs/ starts perfectly with it disconnected. No way to scan it, I've never found anyone here in Aus who can scan obd1.
In one of your comments in those links you mention BSE 57854 as their "new" maf yet it has bosch on the base of it, any idea what the deal is there ?
In one of your comments in those links you mention BSE 57854 as their "new" maf yet it has bosch on the base of it, any idea what the deal is there ?
No idea! Maybe the picture is not actual pic, but generic. I've never ordered a "new", so I don't know if they have Bosch stamped on them. The remanufactured do.
Here's a good thread to help with MAF diagnosing (I get involved at post #14):
Hmm, interesting that in the pic you posted on that thread of the ecm pinout, B12 maf sensor input, looks damaged on mine, noted in my thread in regards to my constant stalling...
Posts #56 & #63
Related you think ?
Hmm, interesting that in the pic you posted on that thread of the ecm pinout, B12 maf sensor input, looks damaged on mine, noted in my thread in regards to my constant stalling...
Posts #56 & #63
Related you think ?
Hmm, interesting that in the pic you posted on that thread of the ecm pinout, B12 maf sensor input, looks damaged on mine, noted in my thread in regards to my constant stalling...
Posts #56 & #63
Related you think ?
The mish-mash of melted wires, connectors and electronic components does not look good. It's a fire hazard and frankly could damage other electronic components. No matter what, it needs fixing before going any further.
I don't understand why you started this thread when the other thread is incomplete and you still have your major ECM/melted wiring issue. I would unplug the battery if I were you and fix this major issue first unless you want your car to burn and your garage/house with it.
12-23-2023, 03:38 PM
