So it fires right up, but idles like a diesel truck and hesitates like crazy if I give it gas. The timing is probably off. I set the CPS per TSRM but can't keep the engine idleing long enough to set timing with timing light. The a/f is 14.7 at startup and drop to around 13.5 once operating temp is reached. However when I give it gas and actually start building any positive pressure (maybe 1psi), it goes crazy lean. If I don't give any gas, the engine dies after about a minute. Fires right back up and does the same thing. Once warmed up, it'll die right away unless I give it gas. Oil pressure is good and I'm pulling around 21psi of negative pressure at idle, which is surprising since the engine is supposed to have raised cams.
My engine management is not ideal for the simple fact that I am trying to use a 2jz tps on a 7M ecu with piggybacks. Some members have said it would work as long as I set the tps below idle point. I get an idle signal, but the car still won't idle properly. I am unsure if it's the tps or not. The hesitation when giving it gas is most likely from the tps though. I read in a very old SF post that the 2jz TPS puts out the wrong resistance for our injectors, but that doesn't make any sense to me. I am using a JDM 7mgte ECU (I'm running no EGR), HKS VPC and SAFC2. I've never used a SAFC before and performed the initial setup but did not adjust any of the fuel points yet as I feel this is not necessary at this point. I moved the idle knob on the VPC from 12oclock all the way to 6oclock, yet my AF's did not change at all. I would think they would go crazy rich. Is my VPC defective perhaps?
I knew I was way over my head here with this project. But after years of giving the vehicle to idiot mechanics (who destroyed my ride) and not having qualified SM members in my area to help out, it was either part out the thing or do it myself. I chose the latter and ended up here. I figure going standalone makes sense at this point, but there are several reasons I don't feel like taking this route. First off, I'm not jumping at spending $1800 on an AEM and pulling my current piggybacks. Secondly, I want to be sure there aren't any other issues that I have overlooked that are causing my engine's problems.
I can rotate the 1jz tb's butterfly and use a 7m tps, but it'll be tough to weld in a lip to keep the butterfly sealed at idle, and it'll also be a performance hit due to the reduce diameter and turbulence caused by the lip. There's always the option of ditching the 1jz throttle body and using a 7M TPS, but that would require mechanical mods like moving the Tial BOV to the intake pipe, creating a flange for a different throttle body, fabbing a new throttle cable and bracket, and changing the IC pipe going to the TB due to the angle change. With winter coming and me not having a garage anymore, all of this is quite difficult. Not to mention, I like the aesthetics of my current setup and putting a 7m or Q45 throttlebody on my manifold will look like ass imo.
I'm not surprised that I'm having these problems as I built my entire setup on the idea that I could get the 2jz tps to work. I may have been wrong. Has this ever been done before? If not, can a TPS have it's tolerances modified? I'd be willing to spend quite a bit of $$$ to get my current setup working the way it sits. I've had issues in the past, but currently there are no leaks and I'm throwing no codes. Can anyone help me get this baby running???
If there's someone qualified in my area to work on this problem please let me know. I'm at my wits end here. And by qualified I mean that they are familiar with this engine and it's electronics. Not someone who wants to play around with an expensive toy. As that's what I've been doing up until this point.
My engine management is not ideal for the simple fact that I am trying to use a 2jz tps on a 7M ecu with piggybacks. Some members have said it would work as long as I set the tps below idle point. I get an idle signal, but the car still won't idle properly. I am unsure if it's the tps or not. The hesitation when giving it gas is most likely from the tps though. I read in a very old SF post that the 2jz TPS puts out the wrong resistance for our injectors, but that doesn't make any sense to me. I am using a JDM 7mgte ECU (I'm running no EGR), HKS VPC and SAFC2. I've never used a SAFC before and performed the initial setup but did not adjust any of the fuel points yet as I feel this is not necessary at this point. I moved the idle knob on the VPC from 12oclock all the way to 6oclock, yet my AF's did not change at all. I would think they would go crazy rich. Is my VPC defective perhaps?
I knew I was way over my head here with this project. But after years of giving the vehicle to idiot mechanics (who destroyed my ride) and not having qualified SM members in my area to help out, it was either part out the thing or do it myself. I chose the latter and ended up here. I figure going standalone makes sense at this point, but there are several reasons I don't feel like taking this route. First off, I'm not jumping at spending $1800 on an AEM and pulling my current piggybacks. Secondly, I want to be sure there aren't any other issues that I have overlooked that are causing my engine's problems.
I can rotate the 1jz tb's butterfly and use a 7m tps, but it'll be tough to weld in a lip to keep the butterfly sealed at idle, and it'll also be a performance hit due to the reduce diameter and turbulence caused by the lip. There's always the option of ditching the 1jz throttle body and using a 7M TPS, but that would require mechanical mods like moving the Tial BOV to the intake pipe, creating a flange for a different throttle body, fabbing a new throttle cable and bracket, and changing the IC pipe going to the TB due to the angle change. With winter coming and me not having a garage anymore, all of this is quite difficult. Not to mention, I like the aesthetics of my current setup and putting a 7m or Q45 throttlebody on my manifold will look like ass imo.
I'm not surprised that I'm having these problems as I built my entire setup on the idea that I could get the 2jz tps to work. I may have been wrong. Has this ever been done before? If not, can a TPS have it's tolerances modified? I'd be willing to spend quite a bit of $$$ to get my current setup working the way it sits. I've had issues in the past, but currently there are no leaks and I'm throwing no codes. Can anyone help me get this baby running???
If there's someone qualified in my area to work on this problem please let me know. I'm at my wits end here. And by qualified I mean that they are familiar with this engine and it's electronics. Not someone who wants to play around with an expensive toy. As that's what I've been doing up until this point.
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