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Troubleshooting: B18C5 Swap questions

 
Old 03-06-2019, 01:47 PM
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Default Troubleshooting: B18C5 Swap questions

I have a B18c5 swap in my 99 GSR chassis. engine ran until started doing long cranks with bouncy idles. i cleaned out the iacv, replaced spark plugs, wires, dizzy cap + rotor, and fuel filter. now it starts but shuts off right away. I need some advice
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Old 03-06-2019, 11:47 PM
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Default re: Troubleshooting: B18C5 Swap questions

??
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Old 03-07-2019, 04:36 AM
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Default re: Troubleshooting: B18C5 Swap questions

Might need new IACV.

Throwing any cels?
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Old 04-01-2019, 08:01 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Yes it does from an 02 sensor for bank 2 of 2. got it replaced. still has the code. I'll get the engine scanned tomorrow.

Ill try to keep this thread updated, been very busy this whole month.
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Old 04-02-2019, 06:34 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by 2x0 View Post
Might need new IACV.

Throwing any cels?
CEL code shows P0744 - Torque converter clutch solenoid circuit intermittent.

I also replaced the PCV, hoses and gaskets yesterday...

So far, I have to crank the engine couple of tries for it to hold an idle. On the first try, the engine turns then dies right away. 2 or more times after it holds the idle. From there it the RPM gradually rises from .7 rpm to 1.7 rpm the highest..
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Old 04-04-2019, 09:39 AM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by chrisbactive View Post
CEL code shows P0744 - Torque converter clutch solenoid circuit intermittent.
why are you getting an auto-trans DTC on a B18C5? which ECU are you using?
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Old 04-04-2019, 11:29 AM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by Relic1 View Post
why are you getting an auto-trans DTC on a B18C5? which ECU are you using?
p73 ecu

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Old 04-04-2019, 12:31 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by Relic1 View Post
why are you getting an auto-trans DTC on a B18C5? which ECU are you using?
p73 ecu
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Old 04-05-2019, 04:54 AM
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Default Re: Troubleshooting: B18C5 Swap questions

That is the outside sticker of the ecu case. This obviously can be replaced or the inside board could be replaced. Take some details of any labeling inside the ecu and one detailed pic of the ecu board.
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Old 04-06-2019, 08:04 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by AllMtrRex View Post
That is the outside sticker of the ecu case. This obviously can be replaced or the inside board could be replaced. Take some details of any labeling inside the ecu and one detailed pic of the ecu board.




Here it is...
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Old 04-07-2019, 05:27 AM
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Default Re: Troubleshooting: B18C5 Swap questions

You need to remove the label on the warranty and open the case. A p73 will not throw a automatic transmission code . Someone switched the board out most likely, or even the big chip inside.
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Old 04-08-2019, 11:18 AM
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Default Re: Troubleshooting: B18C5 Swap questions

one other thought..... P0744 - suggesting a scan tool, P73-023 is a JDM ECU.... ie not USDM OBDII scan tool compliant, it will not even respond to the request.
I would not break the warranty sticker until you check how the scan was done.

use the jumper method (just like OBD1) and pull the codes.
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Old 04-08-2019, 11:38 AM
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Default Re: Troubleshooting: B18C5 Swap questions

I've never seen a warranty sticker on a ecu in 16 years of working on these cars. Likely from the shop that swapped the engine in your car. Pull the codes like relic suggested and if you do not get anywhere, remove the sticker and open it up and post pictures.

However, this is all unrelated to the original point of supposedly the engine was running fine and then long cranks to start. Verify mechanical timing, make sure the plugs are not fuel saturated, bouncy idle to some means the tachometer wants to jump all over, to others it may mean the engine is stumbling then cuts off. Define this.
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Old 04-08-2019, 02:21 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by Relic1 View Post
one other thought..... P0744 - suggesting a scan tool, P73-023 is a JDM ECU.... ie not USDM OBDII scan tool compliant, it will not even respond to the request.
I would not break the warranty sticker until you check how the scan was done.

use the jumper method (just like OBD1) and pull the codes.
JDM ecu will not communicate with a obd2 tool. Half the box says rs 99 . Something is suspect there and the warranty label doesn't even have the company name who has the warranty. O.P can you give us more details on how you got code ? Did the problem just appear after a swap or was it running fine? Do you actually have a warranty for your ecu ? I wouldn't buy one as of lately without opening them up.
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Old 04-10-2019, 01:05 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by Relic1 View Post
one other thought..... P0744 - suggesting a scan tool, P73-023 is a JDM ECU.... ie not USDM OBDII scan tool compliant, it will not even respond to the request.
I would not break the warranty sticker until you check how the scan was done.

use the jumper method (just like OBD1) and pull the codes.
I will do the Jumper method this week and keep it posted..
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Old 04-10-2019, 01:11 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by AllMtrRex View Post
I've never seen a warranty sticker on a ecu in 16 years of working on these cars. Likely from the shop that swapped the engine in your car. Pull the codes like relic suggested and if you do not get anywhere, remove the sticker and open it up and post pictures.

However, this is all unrelated to the original point of supposedly the engine was running fine and then long cranks to start. Verify mechanical timing, make sure the plugs are not fuel saturated, bouncy idle to some means the tachometer wants to jump all over, to others it may mean the engine is stumbling then cuts off. Define this.
engine stumbles then cuts off.
I have to start it a few times to hold an idle.

at cold start it holds at .6 - .8 rpm and when it gets warm, idle holds around 1.5 rpm
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Old 04-10-2019, 01:20 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by stin1 View Post
JDM ecu will not communicate with a obd2 tool. Half the box says rs 99 . Something is suspect there and the warranty label doesn't even have the company name who has the warranty. O.P can you give us more details on how you got code ? Did the problem just appear after a swap or was it running fine? Do you actually have a warranty for your ecu ? I wouldn't buy one as of lately without opening them up.
ecu box says b18c r, 5 and R, 5 99...

I will have the to check the code using the jumper method. had it scanned at autozone but read Error. took it to the cashier and plugged it in his computer and read the code p0744. the vehicle was running fine before..
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Old 04-11-2019, 03:58 AM
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Default Re: Troubleshooting: B18C5 Swap questions

You can't pull codes from JDM ecu's using a scan tool. Just because someone wrote on there with marker the ecu is for B18C R, 99' doesn't mean that's really whats inside the case.
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Old 04-16-2019, 08:07 AM
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Default Re: Troubleshooting: B18C5 Swap questions

Here they are guys. been busy this whole last week. tia


top view..



bottom view..
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Old 04-22-2019, 11:13 AM
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Default Re: Troubleshooting: B18C5 Swap questions

Looks like a legit jdm 00-01 ITR P73 ecu. Plug it back in and use the jumper to get the codes.
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Old 04-23-2019, 10:20 AM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by AllMtrRex View Post
Looks like a legit jdm 00-01 ITR P73 ecu. Plug it back in and use the jumper to get the codes.
did the jumper method..
1 long , 6 fast blinks. i think code refers to Fuel Injector

TIA
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Old 04-23-2019, 10:41 AM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by AllMtrRex View Post
Looks like a legit jdm 00-01 ITR P73 ecu. Plug it back in and use the jumper to get the codes.
1 long blink, pause, 6 fast.

not sure if its code 10 and 6 or 16
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Old 04-23-2019, 11:49 AM
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Default Re: Troubleshooting: B18C5 Swap questions

UPDATE: reset the ecu. code does 6 fast blinks only.
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Old 04-23-2019, 12:09 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Engine Coolant Temp error (ECT). More than likely a wiring issue but the sensor is located on the side of the head below the distributor. It's 2 pin connector.

Have you tried to start the car recently, with the same exact issue as original? Starts then stumbles then shuts off?
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Old 04-23-2019, 05:28 PM
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Default Re: Troubleshooting: B18C5 Swap questions

Originally Posted by AllMtrRex View Post
Engine Coolant Temp error (ECT). More than likely a wiring issue but the sensor is located on the side of the head below the distributor. It's 2 pin connector.

Have you tried to start the car recently, with the same exact issue as original? Starts then stumbles then shuts off?
UPDATE:

Checked the wiring... loose connection. cleaned it up and re wired. rpm idle dropped from 1.7 rpm to .9 rpm idle. CEL went away but came back again with CEL code 14 for IACV. I tried cleaning IACV recently. might be time for a new one??

it was a 1 pin plug btw...
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