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Old 09-11-2010, 12:45 AM   #26
cosbySweater
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Did this work out for you? I am about to do the exact same swap in my car
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Old 09-11-2010, 12:58 AM   #27
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Sbabbs, I was talking about using the LH 2.2 / 2.0 Throttle body and not the 2.4 TB. so you get to use the black idle air adjust/CO Screw. Makes it easier to dial in the idle.
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Old 09-20-2010, 02:49 AM   #28
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Ok. I pinned out our 89 240 harness tonight fir the kjet to 2.4 swap.

Big grey plug under hood at firewall. 4 wires. Looks like the 2.4 harness plugged right in. The remaining wires for kjet go unused. The 4 wires on the 2.4 harness were:

Red: Alternator stimulator wire
Yellow: Coolant temp for guage
Black: Oil pressure warning light wire
Yellow/Blue: Starter


The white 9 plug harness-Now I'm still working on the specifics, but I used the Bentley/Volvo diagram and pinned it out with multimeter too:

Yel/Red: Power Relay. Pin 87/2
Grey/Red: ecu pin 15. A/C Delay Relay
Red/Blk: ecu pin 35. Instrument connection
Purple: ecu pin 14. Instrument (AW trans)
Blue: ecu pin 34. Instrument
Green: ecu pin 26
Yel/Blue: Crank service socket
Yel/Red: into harness. Heated O2.
Pink x2: ecu pin 22. Inst. connection
icu pin 43. Inst connection

That's where we are at. I still need to read more, but now I know what these wires do, I wanna hook em up right!
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Old 09-20-2010, 03:01 AM   #29
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I know it's vague with those multiple "instrument connection" wires, but that's all the book said.

I'm gonna update the post later once I learn more.

Please elaborate if you know exactly where and how to hookup these last 9 wires.
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Old 09-20-2010, 10:20 AM   #30
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Yah, ZVOLV it looks like you are doing a good job. My project is on hold for a few weeks due to school sucking so hard. I should get back to it in the next few weeks. When I do I am going to use the information I have to try and hook stuff up and see what where to go from there.

Thanks
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Old 09-21-2010, 01:14 AM   #31
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Spent some more time on it today.

There are really only 9 wires that need to be spliced in from what I can tell so far. Its this 9 wire plug that goes underneath the dashboard and over to the computers:





The wires on ours was identical to the one in this image with the exception of the location of two of the wires. We had a Red/Black in the top right for the speedo wire and a Blue wire in the very middle for the wire to the igntion switch.

On ours, these 9 wires are as follows:

Yel/Red: Power Relay. Pin 87/2 (Fuel Pump)
Grey/Red: ecu pin 15. A/C Delay Relay
Red/Blk: ecu pin 35. 12v Switched
Purple: ecu pin 14. Instrument (Shift Indicator)
Blue: ecu pin 34. Speedo wire. Connect to cruise ouptut (dual male connector on back of cluster)Green: ecu pin 26 (A/C dryer pressure switch)
Yel/Blue: ("Starter" service socket) Not used
Yel/Red: into harness. (Heated O2.)
Pink x2: ecu pin 22. Inst. connection (Check engine light)
icu pin 43. Inst connection (Check engine light)


This plug went directly into the existing 1984 240 Turbo chassis harness. The 4 wires on the 2.4 harness correlated exactly with the wire colors on the chassis harness, so all that was needed was to plug it in. Like mentioned above, they serve these functions:

Red: Alternator stimulator wire
Yellow: Coolant temp for guage
Black: Oil pressure warning light wire
Yellow/Blue: Starter


Last edited by ZVOLV; 03-08-2011 at 12:24 AM..
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Old 09-21-2010, 01:17 AM   #32
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Dupe
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Old 09-21-2010, 02:04 AM   #33
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Quote:
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Dope
Its in your last picture
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Old 10-23-2010, 09:30 PM   #34
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Doing this swp as we speak!
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Old 10-24-2010, 12:09 AM   #35
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haha, i am just starting to run the wires tomorrow. Only thing I have left to do until the car is done. I put it off until now.
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Old 12-01-2010, 05:12 AM   #36
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oops
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Old 01-17-2011, 08:11 AM   #37
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I am also in the middle of doing the swap from lh 2.2 to 2.4 in my 88 mod 740.

I have one question, can i use the existing coolant temp sensor from lh 2.2 on the 2.4 ecu\ezk?
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Old 01-17-2011, 10:10 AM   #38
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No, you will need a new LH 2.4 coolant temp sensor.
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Old 01-17-2011, 01:09 PM   #39
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No, you will need a new LH 2.4 coolant temp sensor.
Ok, thanks

Does anyone know what is different?
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Old 01-17-2011, 01:37 PM   #40
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2.4 temp sensor is different than 2.2.

We hooked up the wires last night. Only 4 wires used so far and we have spark and fuel pressure.

On our 84 240T we just hooked up:

Thicker Red/Yellow: We put male spade and plugged into old fuel pump relay plug

Thinner Red/Yellow: We put to fuse 5. Fused 12v Pwr for heated O2.

Red/Blk: Switched ign power off fuse 12.

We did not follow the previous diagram of blu/yel for starter or solid blue as ign power. Blue yellow on this dash pigtail appears to be for starter test and blue is speedo signal.

Thats it so far. Getting custom fuel lines and finishing small stuff now.
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Old 01-17-2011, 01:43 PM   #41
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Starter gets cranking signal thru the blue yellow wire on the small pigtail on the existing firewall harness. (see pic of this pigtail above. Plant pic.)

We had red/blk and solid blue backwards. Red/blk was ign power and blue was speedo. Not the other way around as previously mentioned.

Oh, and the 4th wire was just extending a blue wire by the coil and hooking it to coil for 12v switched with ign on.

Last edited by ZVOLV; 01-17-2011 at 01:51 PM..
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Old 01-18-2011, 12:32 AM   #42
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Just fired it up twice. It runs!
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Old 01-18-2011, 02:22 AM   #43
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So it fires up every time effortlessly. The only issue so far is a lot of idle surge. Goes consistently up and down to around 1500rpms. Gonna recheck for airleaks and tps values at ecu. It clicks when opening or closing the throttle though. Any ideas?? I did a search and TPS, airleaks, and IAC are suggestions. I also know 2.4 acts up with different injectors. Right now we have orangetops and no resistor pack.

Edit- and no codes. 1-1-1 on both fuel and ign test sockets.
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Old 01-18-2011, 02:43 AM   #44
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ZVOLV, this is exactly what mine is doing. When I unplugged my MAF, the car idles perfect. Let me know if you figure anything out. I will do the same.
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Old 01-18-2011, 02:49 AM   #45
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We will recheck the MAF relocation wiring. The MAF is an almost new looking one we snagged from a very clean dealer serviced 940. There is a very new Volvo part number sticker on the thing.

What injectors are you running? I know my 940 had idle surging probs once after changing to browntops.
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Old 01-18-2011, 03:05 AM   #46
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I am using these.

http://www.fuelinjectorconnection.co...&productId=101
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Old 01-18-2011, 03:44 AM   #47
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We pinned out the MAF, TPS, and temp sensor leads and they all check out. It also passed the mode 2 and mode 3 diagnostic tests. Changing IAC didn't help either.
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Old 01-19-2011, 03:06 PM   #48
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Here is a goofy viedo of the surging idle:

http://www.youtube.com/watch?v=V8HCfLTIBKs

Do you think the speedo wire disconnected would really cause this? Or is it something else? All the sensors to the computers including MAF, TPS, and Temp sensor have good connections. TPS and Temp give proper readings. Havent checked MAF values at the computer yet. I think its 2.4 not knowing what to do with 850 Turbo injectors. I know my car did some whacky idling with different injectors than stock.
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Old 01-19-2011, 03:10 PM   #49
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With the MAF unplugged it idles like crap and barely runs.

It also passes the Mode 2 OBD test where you test the TPS, RPM sensor and one other component. It flashes a code that each one it OK.

It also passed the Mode 3 OBD test where it clicks the injectors, clicks the IAC, and then clicks the cold start injector.
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Old 01-19-2011, 04:56 PM   #50
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ZVOLV, i have the wire for the speed signal hooked up to the gauge cluster and It still idles strange. If that wire is not hooked up and the car doesnt move, it theoretically shouldnt make it idle strange
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