DO1023 Posted May 11, 2018 Report Share Posted May 11, 2018 I previously had an issue where I could not get one of my injectors to fire... ( see here -> http://forums.linkecu.com/topic/8319-st185-pnp-injector-3-not-firing/?tab=comments#comment-55843 ). I swapped out to another ecu, solving that problem but now I'm running into an issue where I absolutely cannot get the car to run correctly. It runs for a few moments, very, VERY roughly.. as if it's misfiring, and then dies. If I give it any throttle, it'll run for a few moments more. I would also like to mention that when I set base timing, I was dead on 0 for trigger offset at 10BTDC. I've change the trigger offset by 360 because I was advised this was necessary to get the car to run with these smart coils. The injectors are Bosch Ev14. Part #0 280 158 040. I'm running genuine Toyota 1zz smart coils. I've verified no vacuum leaks. I've verified all coils fire via an ignition test I've verified all injectors fire via an ignition test. I have deleted my OEM injector resistor packs by tying all wires to that plug together ( this seems to be the way to do this. ) Compression test yields 180psi across all four and fuel is in the rail. Below is my map. I'm really looking for some insight here as I am truly struggling to get this car running. I really appreciate any assistance. Thanks in advance. Daniel_map_final.pclr Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted May 11, 2018 Report Share Posted May 11, 2018 I'm about to glance through the calibration. Is there any chance of you uploading a log of the issues occurring? Edit: Based on what i see in the calibration, there is still a tremendous amount of work needed to get this moving in the right direction. Fuel is not anywhere near functional. This is your key issue here. Try dropping the injector scalar incrementally. Doing so should richen the engine up and I believe will help with your running conditions. Also your fuel table needs a ton of work and smoothing. There is too much dwell in the operational area of the table. At 14v the dwell is 3 ms. Needs to be more like 1.8. Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 11, 2018 Author Report Share Posted May 11, 2018 3 hours ago, Brad Burnett said: I'm about to glance through the calibration. Is there any chance of you uploading a log of the issues occurring? Edit: Based on what i see in the calibration, there is still a tremendous amount of work needed to get this moving in the right direction. Fuel is not anywhere near functional. This is your key issue here. Try dropping the injector scalar incrementally. Doing so should richen the engine up and I believe will help with your running conditions. Also your fuel table needs a ton of work and smoothing. There is too much dwell in the operational area of the table. At 14v the dwell is 3 ms. Needs to be more like 1.8. Thanks for this. This is my first attempt at tuning so I'm still learning a lot. I'm going to apply everything you've said and see what happens. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 12, 2018 Report Share Posted May 12, 2018 I have attached a copy of your map with a few fixes. I think the main problem would have been the VE table numbers were very small. I also turned the IAT trim table off, turned on the pre-crank prime and entered some more realistic dwell times. Daniel_map_startup.pclr Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 12, 2018 Author Report Share Posted May 12, 2018 Much appreciated Adam. I'll try this out. Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 13, 2018 Author Report Share Posted May 13, 2018 Adam, Those changes actually got it running! it still defiitely seems to be misfiring.. hard, but it stays running. I can't really figure out why it would be misfiring.. with a test, all coils and injectors are firing. More fuel? Here's a log. running_rough_log.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 14, 2018 Report Share Posted May 14, 2018 Im suspicious there may be a trigger issue from how erratic your logged RPM ROC is. Can you do a triggercope at idle: https://1drv.ms/v/s!AiYbYlZQuRHPmieMTkwQDCXEb2LY Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 14, 2018 Author Report Share Posted May 14, 2018 Sure. I'll create one today. Here's is one that I made a few weeks ago while chasing this same issue. 5ace1f0d4f101_TriggerScopeLog2018-04-11104250am.llg Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted May 14, 2018 Report Share Posted May 14, 2018 Theres an awful lot of noise on trigger 2. Maybe try raising the filter on trig2 from level 1 to level 2? Is this a custom built harness or is it the factory unit? If it is still the factory original unit, you may want to rerun the trigger wires with new shielded cables that aren't 20 years old. Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 14, 2018 Author Report Share Posted May 14, 2018 This is the factory unit. I'll bump up the filter and then check out that wiring. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 14, 2018 Report Share Posted May 14, 2018 Please do another scope with the engine running first, that older one looks like maybe it was only taken during cranking? If so it will improve with speed. Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 14, 2018 Author Report Share Posted May 14, 2018 I bumped up the filtering to 2. Confirmed all plugs were good and ran it. Here is a scope as well as a log of the same conditions. running_rough_log.llg trigger scope 1.llg Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 15, 2018 Author Report Share Posted May 15, 2018 I'm really just starting to believe I have a timing issue. Anyone have any ideas on how to ensure I have the engine timing synced with the ecu properly? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 15, 2018 Report Share Posted May 15, 2018 36 minutes ago, DO1023 said: I'm really just starting to believe I have a timing issue. I agree, your triggerscope and log looks ok. If you havent already set you base timing then that could certainly cause it to run poorly. 49 minutes ago, DO1023 said: Anyone have any ideas on how to ensure I have the engine timing synced with the ecu properly? Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 15, 2018 Author Report Share Posted May 15, 2018 I thought I had this done when I had the car running on stock ignition but it wouldn't hurt to check. I'll do just that. Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 16, 2018 Author Report Share Posted May 16, 2018 The issue ended up being a trigger issue. Thanks a lot for everyone's help! I've learned a lot from this process. She's running and running quite smoothly. Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted May 17, 2018 Report Share Posted May 17, 2018 what was the issue with the triggers? Quote Link to comment Share on other sites More sharing options...
DO1023 Posted May 17, 2018 Author Report Share Posted May 17, 2018 The triggers themselves were setup correctly ( as they were just copied over from the mr2 base map that ran my car ). It was an offset issue. I had to physically move the distributor so that with zero trigger offset and timing locked to 10 BTDC, The timing mark would line up with 10 BTDC on the crank. THEN I had bump the trigger offset to 360 and it fired right up. Sounds healthier than ever. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.