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Old 08-25-2019, 07:11 PM   #1
hessam69
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Default Chips for stock NA 940

Hi,

I have a 100% stock standard NA 940. I'm not thinking about doing any modifications other than a chip for the LH 2.4 and EZK if there are benefits, particularly with the ignition timing. It already has a 531 head and VX3 cam since it is a B230FB.

I would like some better throttle response, more power if there is free HP hidden by use of a chip, I know standard tunes are very conservative fuelling and ignition wise

I'm happy to hear any advice

Thank you
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Old 08-25-2019, 08:00 PM   #2
dl242gt
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If you are staying stock and are willing to use premium fuel. Then you only need to chip the ezk. You'll need a chip able ezk like a gold box one which should be in your car. I got my ezk chip from sbabbs. Pm him for information.

I used mine in a 93 245 which only has a enem V15 cam and Simons sport exhaust. It did exactly what you describe. Better throttle repsonse, a bit more power, and better mileage per tank.
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1993 245 Classic, 420k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
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Old 08-25-2019, 08:28 PM   #3
hessam69
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That's the answer I was looking for. Thank you
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Old 08-25-2019, 09:36 PM   #4
90volvo
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I have 3 240 cars all with the 2.4. Recently in process doing a plus T. I removed the EZK which had a chip in it and I ran premium fuel all the time. I noticed some gain with the chip. So the other day, I removed the EZK and installed it in another car I own. Because adding a T requires a ECU and EZK out of a Turbo car. Which came out of a 940 T car. I just changed out the EZK nothing else and I cant believe it. It ran better with the Turbo EZK than it did with the chipped ezk. I let some one else drive it with out saying anything and they came back and said man what did you do to your car? So I put the another NA ezk in it and it was like loosing 20 hp. My car is in tip top shape and I keep it serviced. But I thought this was an interesting find. I can give you the number off the ezk evidently it has better timing. Is my guess.
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Old 08-26-2019, 04:40 AM   #5
mrjaybeeze
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Quote:
Originally Posted by 90volvo View Post
I have 3 240 cars all with the 2.4. Recently in process doing a plus T. I removed the EZK which had a chip in it and I ran premium fuel all the time. I noticed some gain with the chip. So the other day, I removed the EZK and installed it in another car I own. Because adding a T requires a ECU and EZK out of a Turbo car. Which came out of a 940 T car. I just changed out the EZK nothing else and I cant believe it. It ran better with the Turbo EZK than it did with the chipped ezk. I let some one else drive it with out saying anything and they came back and said man what did you do to your car? So I put the another NA ezk in it and it was like loosing 20 hp. My car is in tip top shape and I keep it serviced. But I thought this was an interesting find. I can give you the number off the ezk evidently it has better timing. Is my guess.
Hi
Very typical result as the LH2.4 are set up with too high ignition timing from the factory and thereby floating on the knock sensor most of the time.
The knock sensor backs of on three degree increments and creep slowly upwards to regain timing until it knocks again. The end result is that most of the time the ignition timing is too retarded and fuel economy and power is suffering.

YS
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Old 08-27-2019, 03:26 AM   #6
hessam69
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Hi,

Today I installed a turbo EZK. I did not notice any difference, is this something the ECU must learn over some time?
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Old 08-29-2019, 07:48 PM   #7
dl242gt
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This is a non chipped turbo ezk? If so it is expecting a load signal as if it was turbocharged. So there probably wouldn't be any difference with a stock turbo ezk in an n/a car.

A turbo ezk is expecing a load signal from the fuel computer. Which tells the ezk to back off the timing under boost.
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Old 08-29-2019, 09:51 PM   #8
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Don’t know why but I noticed a difference in my nap car. Now could be a freak deal. I tear into my mass air wiring and found a cobbled upwire job.
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Old Yesterday, 05:54 PM   #9
90volvo
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Originally Posted by 90volvo View Post
Don’t know why but I noticed a difference in my nap car. Now could be a freak deal. I tear into my mass air wiring and found a cobbled upwire job.
Dont know why the 148 made a difference in the way the car would idle and it ran smoother. Felt stronger. Did some troubleshooting and firgured out that my O2 sensor was bad. So sorry I miss led you in trying a 148 EZK. I still have a NA chip with a EZK that Id sell if your still searching. Made by theo. Thanks
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Old Today, 01:01 AM   #10
hessam69
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I tried the 148, the car started misfiring intermittently, lost some uphill power (needing 2nd gear instead of 3rd), and generally ran worse. Put the 175 back in, much better. How much is your chipped EZK? Thank you
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