6 bolt swap dies

[BWeston]

Hello. I've worked on a 6-bolt swap in my '98 GS-T for a few weeks now, I can't seem to get any help with it. I had a few questions regarding the CAS and the ECU.
To start off, I know it's normal to get random misfire codes with the 1G CAS, but is it normal to get the P0340? (camshaft position sensor circuit malfunction) I have another ECU from a 97 GS-T, we tried swapping it in to see if it made things any easier on us and for some reason it's only firing on cylinders 2 & 3, and not 1 & 4, so we couldn't set the timing with it. The ECU that came with the car originally cranks and fires on all 4 cylinders, but when you crank the car, it wont stay running long enough to time it, it just dies. it's not sputtering, the computer just shuts itself down. I think the P0340 code is causing it to die, which makes sense. We changed coil packs and power transistor pack, and everything we thought would cause it to die like it is. Can anyone who's done the swap or knows about them offer some advice?

 

[Pursuit]

Hello. I've worked on a 6-bolt swap in my '98 GS-T for a few weeks now, I can't seem to get any help with it. I had a few questions regarding the CAS and the ECU.
To start off, I know it's normal to get random misfire codes with the 1G CAS, but is it normal to get the P0340? (camshaft position sensor circuit malfunction) I have another ECU from a 97 GS-T, we tried swapping it in to see if it made things any easier on us and for some reason it's only firing on cylinders 2 & 3, and not 1 & 4, so we couldn't set the timing with it. The ECU that came with the car originally cranks and fires on all 4 cylinders, but when you crank the car, it wont stay running long enough to time it, it just dies. it's not sputtering, the computer just shuts itself down. I think the P0340 code is causing it to die, which makes sense. We changed coil packs and power transistor pack, and everything we thought would cause it to die like it is. Can anyone who's done the swap or knows about them offer some advice?

make sure to double Check the Cam Angle Sensor swap, check all the wires and the plug. if you are getting the code something its not done right.

RRE Instructions

 

[BWeston]

make sure to double Check the Cam Angle Sensor swap, check all the wires and the plug. if you are getting the code something its not done right.

RRE Instructions

Everything is wired up as it should be, I bought the 1G CAS harness that you just plug in to the crank angle sensor bung.

 

[Pursuit]

Everything is wired up as it should be, I bought the 1G CAS harness that you just plug in to the crank angle sensor bung.

Remove the cas , and spin in by hand when the key its on so you can see if it the spark or fuel problem. If you have tester light, for the injectors that will help. the spark you can check easy.

But like i say if everything its done right , P0340 will not show up.

Also did you try to replace the Cas? To see if that would change anything.

 

[BWeston]

Remove the cas , and spin in by hand when the key its on so you can see if it the spark or fuel problem. If you have tester light, for the injectors that will help. the spark you can check easy.

But like i say if everything its done right , P0340 will not show up.

Also did you try to replace the Cas? To see if that would change anything.

I overlooked the white wire. I thought it was a ground or something, I just now spliced it into the blue wire on the old cas plug from the harness. It fired up and idled! Still needs timed though, and she should be street ready! Thanks for the help man.

 

[Pursuit]

I overlooked the white wire. I thought it was a ground or something, I just now spliced it into the blue wire on the old cas plug from the harness. It fired up and idled! Still needs timed though, and she should be street ready! Thanks for the help man.

good to hear

 

[g4ebguy90]

Can I ask what the idle was like before you adjusted the timing?

 

[DaRKSiDeGSX]

Can I ask why everyone on here seems to have the great luck of simply having forgot to plug something in? However, in my scenario I have to spend hundreds of dollars, chasing every imaginable angle as Murphy's Law is like my life creed.... I have been stuck in this boat for over a week now with spark on only 2 cylinders no answers and no end in sight....

 

[Pursuit]

Did you try with different ecu ?

 

[DaRKSiDeGSX]

2 95 eprom ecus, 2 1g cas, 3 transistors, 3 coils, 2 sets of wires, 2 sets of plugs, 2 engine coolant temp sensors. I really don't understand this situation at all.

There is an aftermarket alarm which was unplugged..I am not sure if since the circuit is removed if it is preventing 2 cylinders of spark which would be strange instead of no spark. However I believe it ran with the alarm out previously.

I have really banged my head off pretty much everything I can at this point. Aside from the fact that I touched it and everything I touch turns straight to shit. This situation is making little sense to me. Also I can't really expect an average mechanic to troubleshoot this when I'm working with a different engine and simulating information for the ecu to understand crank/cam position with a previous generations used cas.

Someone discussed this issue and found from the transistor pack to the coil they lost the signal. The person ran a jumper and had great results. However, I have been unable to get the information from him regarding what color the wires coming out of the transistor pack I would be looking for.

 

[Pursuit]

So you have harness problem . If you try so many stuff with , same result ... My guess to check the wiring harness.

 

[DaRKSiDeGSX]

I have to get out the multimeter and see where I'm losing continuity. I was hoping it would be something simple like everyone else. The best part about this is EVERYTHING in the car was in perfect functional condition. I swapped a 6 bolt in and I have been forced to replace the ecu, the starter, the coils, the transistor, the engine temp sensor, and much more. I really don't understand how all this could go wrong.

The wire harness having an issue is mind bottling (I love anchorman) I have owned twice this car since 2001 and it has been garage kept all it's life. I never had a problem with anything prior to the engine swap process.

 

[Pursuit]

I have to get out the multimeter and see where I'm losing continuity. I was hoping it would be something simple like everyone else. The best part about this is EVERYTHING in the car was in perfect functional condition. I swapped a 6 bolt in and I have been forced to replace the ecu, the starter, the coils, the transistor, the engine temp sensor, and much more. I really don't understand how all this could go wrong.

The wire harness having an issue is mind bottling (I love anchorman) I have owned twice this car since 2001 and it has been garage kept all it's life. I never had a problem with anything prior to the engine swap process.

if i was you ill just buy another complete harness. or just remove the old one and inspect it. that is a pain , i did same thing to my car. i remove the whole harness ### i was having electrical problems. and tuck the stuff i don't since then i don't have any electrical problems.

 

[DaRKSiDeGSX]

Today I'm going to try my best to completely delete the alarm, all wiring, and remaining garbage associated with it. Hopefully that will cure it.

If not I've got to break the multimeter out and start with seeing where I'm losing continuity before I go dismantling everything. People have had it lost in a short 2 ft. section after the transistor and before the coil pack. If I'm that lucky I'll just have to run a 2ft lead to the other side of the coil.

I really don't know what else would cause spark on only 2 cylinders.

I can see an ecu failing, or a starter. The wiring harness in a car that sits in my garage and never had a problem prior to the engine swap would be a true sign that everything I touch just turns to shit.