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Re: (93turbo16)
It took me a while to pick the right replacement capacitors on digikey. For future reference, these are the part # for the 7 replacement caps needed for a P28:
P5518-ND P5517-ND P5552-ND P5549-ND (x3) 493-1733-ND You will notice that the last number differs from the others. That's because the NHG series didn't carry a 47uf 10v cap. I had to order from the PW series. And the cap that goes out and causes the fuel pump not to prime is P5552-ND. |
Re: Chipped p28 - not priming fuel pump
bump for some really good knowledge here.
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Re: Chipped p28 - not priming fuel pump
stop bumping 10 year olds threads
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Re: Chipped p28 - not priming fuel pump
Is there a rule against doing that?
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Re: Chipped p28 - not priming fuel pump
Agreed, this old thread is worth a bump. I just ordered the capacitors from Digikey. Cost $2.13 + shipping. Cheap insurance in my opinion.
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Re: (JRciv)
Originally Posted by This One
(Post 14272357)
Ive had a few ECU'S with bad fuel pump output or something.
On those we just took the Fuel pump output whichever pin it is, and ground it on the harness side. the fuel pump should come on with ever you turn the Ignition on now. |
Re: (JRciv)
Originally Posted by hybridb18
(Post 14255178)
where is this capacitor at???? where in the ecu?? What number on the board?? i have the exact same problem with my ecu
https://cimg1.ibsrv.net/gimg/honda-t...a93659fb34.jpg https://cimg6.ibsrv.net/gimg/honda-t...c9df3e5aa5.jpg |
Re: Chipped p28 - not priming fuel pump
hello.
I have a problem. I already replaced all the capacitors (c14, c19, c18, c24, c21, c15, c40) in my ecu p28 but it didn't prime the fuel pump. also check the entire circuit is ok. What else can I do? |
Re: Chipped p28 - not priming fuel pump
Originally Posted by wasiba100
(Post 52438840)
hello.
I have a problem. I already replaced all the capacitors (c14, c19, c18, c24, c21, c15, c40) in my ecu p28 but it didn't prime the fuel pump. also check the entire circuit is ok. What else can I do? |
Re: Chipped p28 - not priming fuel pump
Originally Posted by wasiba100
(Post 52438840)
hello.
I have a problem. I already replaced all the capacitors (c14, c19, c18, c24, c21, c15, c40) in my ecu p28 but it didn't prime the fuel pump. also check the entire circuit is ok. What else can I do? IIRC that is the transistor array that controls the main relay also, double check the main relay. lol |
Re: Chipped p28 - not priming fuel pump
Originally Posted by DaX
(Post 52439042)
Other components may be damaged. Try another ECU.
https://cimg3.ibsrv.net/gimg/honda-t...1d49bb3357.jpg https://cimg4.ibsrv.net/gimg/honda-t...fc93c9a00f.jpg |
Re: Chipped p28 - not priming fuel pump
Originally Posted by Full_Tilt
(Post 52439051)
Probably QM3
IIRC that is the transistor array that controls the main relay also, double check the main relay. lol QM3 or DM3? |
Re: Chipped p28 - not priming fuel pump
Originally Posted by wasiba100
(Post 52439056)
QM3 or DM3?
Its one of the 3 transistor arrays used for the high current outputs (injectors, IACV, relays, etc.) |
Re: Chipped p28 - not priming fuel pump
IC17
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Re: Chipped p28 - not priming fuel pump
Originally Posted by Full_Tilt
(Post 52439244)
QM3
Its one of the 3 transistor arrays used for the high current outputs (injectors, IACV, relays, etc.) thx...!! https://cimg8.ibsrv.net/gimg/honda-t...c63be04763.jpg https://cimg1.ibsrv.net/gimg/honda-t...ac84c635ab.png |
Re: Chipped p28 - not priming fuel pump
Glad to hear that worked. Ive tried a few times and it doesnt always work. I think sometimes its the microcontroller that has failed.
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Re: Chipped p28 - not priming fuel pump
Damn, awesome!
Did not know this. 🗻 |
Re: Chipped p28 - not priming fuel pump
Why is there no C201 in that ECU? All mine have it by C14.
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Re: Chipped p28 - not priming fuel pump
Originally Posted by B and B
(Post 52443342)
Why is there no C201 in that ECU? All mine have it by C14.
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Re: Chipped p28 - not priming fuel pump
Originally Posted by Full_Tilt
(Post 52441811)
Glad to hear that worked. Ive tried a few times and it doesnt always work. I think sometimes its the microcontroller that has failed.
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Re: Chipped p28 - not priming fuel pump
Originally Posted by B and B
(Post 52443342)
Why is there no C201 in that ECU? All mine have it by C14.
does anyone know why the ps28 doesnt have the C201...ive searched google but cant find any answers. TIA. |
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