drews240

The ground was actually going to the temp sensor (the injectors are not grounded, check this out>>> I ordered a new TPS (G35) yesterday got quoted $134 Canadian so I was like cool it will be $100 with my Contingency, I go to pick it up and the box weighs like 7Lbs!!! low and behold it comes with the throttle body, yeaaaaa!! i laughed my ass of because if you order the TB it is like $300. Strange little goodness. Anyway I removed the MS grounds form the block today (all of them) and forgot to reconnect them on the chassis, I sarted the car and it seemed to run fine, I don't know for sure yet, why would it start with none of the MS grounds connected (not even touching the body)? Z-YA? have you finished with my MS settings yet? I have a local tech guy coming tomorrow to check everything out and run a scope. If all is well I will test her monday night.

I need to verify that that ground actually goes to the injectors, when i was cleaning up the wiring it looked like one of the chassis grounds went under the plenum. I know there is no resistor! what size resistor does the 12V to the injectors need? I will check it out this morning. I tried the restrictor it did not change anything, it made the car harder to start. Drew

16 gauge from edis to chassis ground The 6 MS ground wires are connected to the engine block 14 gauge there is 1 4 gauge wire from the shock tower to the engine block and 1 braid ground from the engine block to the firewall The injectors are grounded to the chassis. Drew

Well boys at this point aside from the Capacitor I have put in new wires, rewired the TPS and the sensors with the shield done right, I have no arching in the cylinders with the wires, the Crank sensor could not be any closer, I have tried two different EDIS modules 2 different coil packs, we moved the MAP to the back of the throttle body so it os not near cylinder 1. Unplugged the alternator belt and all. My battery "is" in back of the car and is grounded to the body in the rear (clean). I know it is the Mega set up because I had the car running OK on the stock Maxima ECU, its just it cut me off at 6500 and was running too lean so it overheated. Same TPS, same temp sensor, same grounding. HELP!!!!! thanks again Drew

Thanks, will do. have you had time to look at the MS settings?

I have some more questions, temp sensor? the nissan VQ sensor is telling the Mega it is at 300 deg in the data sometimes although the car is never over 200 deg. does it make it glitch? is there a way to calibrate the sensor? I need exact specs for the ice filter on the battery line please? Would the EDIS have a compatabilty issue with the plugs? Thanks' Drew

Did you get a chance to look at the settings? are they ok? much appreciated. Thanks drew

This was sent to me by 200sxBoy, the alternator thing is wierd.Originally Posted by MSEFI.COM I had a similar issue. What do your spark plugs look like when you pull them? My car was being extremely picky with spark plugs after going to the EDIS setup. I had to source plugs 2 steps colder than stock to cure it. I went through a half dozen sets of plugs, each lasting 1 to 2 weeks, before I found the right ones. Now theyve been in there for a full year. The problem was the plugs were arcing out against the block, not firing inside the cylinders at all. Try running your motor in pitch black and rev it up, check around the plugs to make sure they arent arcing out. I've also experienced similar dropouts when my VR sensor wasnt quite close enough to the wheel. and also when the wiring plug for it started to fail. and again when the coilpack plug started to fail. The cure for those is to replace, clean, or tighten all the connectors and harness plugs, and if your motor vibrates alot, hotglue the suckers in place. Upon looking at your log file, I think your problem is related to alternator disturbance. Have you tried to disconnect your alternator, and then take a test run? I had similar disturbance, but got rid of it by installing a capasitor on the alternator, and a regular ice filter on the MS +12v My log file is not anything like yours. All my parameters are nice and clean, exept that the rpm line drops much more than the actual rpm. Problem solved in my case. The drop in my case came from power drop to EDIS. Upon studying the log's I found that the drops came along with small drops of +12V. Connected EDIS directly to battery 12V, and everything ran smoothly. This resulted in a blown piston at 5500revs in fourth gear thoug. My engine didn't cope with 250hp, @ 1,2 Bar boost

the 25uFcapacitor or condensor shown in the drawing goes from 12V + to body groung or Mega EDis ground? Thanks Drew

Ok I understand. So I will redo the TPS WIRE with the three wires sheilded and isolated from engine ground and tied to the Mega ground. the actual braid shield does not get tied to anything does it? if so what wire on the edis? I have sent my settings to z-ya, once he looks them over and confirms everything is ok I will run her Monday night and see if all is well. thanks guys Drew

It is a MS harness (connect the dots), I have now completly rewired the crank and TPS with sheilded wire down to wrapping them up to the connector, ?? I noticed that the TPS is grounded to the block Not sheilded (only the +5V and signal are sheilded) Is that OK?, Also the wire has been placed away from the plug wires. I revisited the crank pully situation and the ring piece is actually press fit into the center pully so it is actually connected directly to the crank itself and the balancing outer pully is still on its own so this should not be an issue. Although I will make it closer to the wheel. thanks Drew

I sheilded the TPS myself just incase. The trigger sensor is more like 1.5mm from the wheel. I noticed tonight when i was reving the car no load the Throttle was never going more than 10% even at 5000RPM but when the motor is not running it goes from 2% to 100% on the guage. You will notice in the log that I send you the TPS is doing really crazy ♥♥♥♥. Drew

I should have cleared this up before, in the graph the TPS dips are me letting off and back on the accelerator when the ignition was cutting on the track. The tuners keep telling me that that signal is sheilded. Can you read my megasquirt settings and tell if they are all cool? Should the sending ring be fixed to the balanced part or the solid part of the crank pully? Thanks again Drew

Well we took it to the Dyno the other night to see if we could address the issues, in a sequence we changed wires after soaking the set I had in salt water to check for arching we did a test and the cuts went away. So we changed the wires and the cuts were still there around 5000 RPM. So we then changed the Coil pack, still no change, decided to regap the plugs to a point to see if it is a wire and coil issue or a ignition module, sensor or wiring issue, We regapped the plugs rediculous to like 80 and it killed the power and moved the cuts to 4000RPM roughly so the two tuners said it is a electronic thing for sure, we then looked at the sending ring and jiggled it a bit to see if it was moving at all and it was slightly but it is like 1/2" thick it is not moving enough to effect anything?? is it? my question is, is the harmonic balance offset because of the press fit ring on the face of the crank pully and at heavy load it is just going crazy? we tested everything for noise (none) all the grounds are good. can I send someone my settings to look at and see if they are cool for this application? Thanks Drew

http://www.anothershade.com/race.htm pics of the car and details also some video. Drew G'day dude.

Thanks, I have a Z33 tranny on my race car with the VQ and i dont like it. Drew

Does anybody know if you can mate a Z32 5 speed with a VQ? If it is not straight forward what is required? Thanks Drew

Does anybody know if you can mate a Z32 5 speed with a VQ? If it is not straight forward what is required? Thanks Drew

oooopppppssss!!!

MS2 V3 ... on a VQ30DE nissan engine running 350z heads i isolated the problem to ~5000rpm , seems like the map sensor is going wild making the ms jump from table to table. The leaner table makes the car stumble and makes the driver unhappy and really frustrated Now the solutions ? Run a restrictor+fuel filter on the map line ? Smothen the map signal in megatune ? Change the map sensor pickup ?(right now it's picking the signal on the small vacuum on the top of the plenum, it's located near cylinder 1 intake tube ) PS : The car was tuned on he dyno so the AFR IS RIGHT , the car is not in accel mode when the cuts appear and it is not because the accel mode goes off that it is leaning . If anyone has a solution i'd be glad to hear it !

I have been having bucking problems and someone suggested putting a restrictor in line with the MAP sensor tube. Has anyone tried this? what do you use. Some say a welding tip and a fuel filter. Any help would be appreciated. Thanks Drew Nissan 240Z race car with VQ Hybrid 3L with 350Z nismo top end.

http://video.google.com/videoplay?docid=5991687772787045438 More video

Any info on a VQ into a Z32 transplant, I love it in my 240 I was thinking that the weight difference and hose increase would be nice. thanks Drew