Alright so I have my J-spec ecu with my JE50 MAF. Installing the MAF is easy, but how do I replace the ecu? If anyone could take the time to spell out step by step how to do this I would really appreciate it. Thnaks. I do know where the ecu is located, my main question is how to get to the ecu.
Screw off the shifter knob and pull off the panel with the shifter assembly. When you do this, you will see the ECU towards the front of the car. Unscrew the screws and unplug the connectors. The ECU should come out easily after this.
"War is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse. The man who had nothing for which he is willing to fight, nothing which is more important than his own personal safety is a miserable creature, and has no chance of being free unless made and kept so by the exertions of better men than himself." -John Stuart Mill
DO NOT ATTEMPT TO TOUCH THE ECU UNTIL THE BATTERY IS DISCONNECTED! Disconnect the negative terminal on the battery. THEN remove the shift knob and lower console panel, disconnect the plug for the ash tray light to remove it completely. Next unplug the connections(x3) to the ECU. Remove the screws and pull out the ECU. Installation is exact opposite of removal.
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Well that was easy. But now I have a question/problem. I got the new ecu in, put everything back together and fired her up. It started up pretty rough, but got to about a normal idle (700-800, a tad bit high). I then too her out for a spin. For about the first mile she had incredible acceleration and power. However, after a little while I began to feel slight rhythmic jerks in the engine. Then after pulling away from a stop sign I notice quite a power loss and very bad acceleration until I hit 3000 rpm, then the car took off. All the way home I still felt the same jerks, even when at a constant speed.
Is this normal after replacing an ecu? Will it work itself out?
Double check over you intake and your VAF. Sound like a vacuum leak. Maybe something didn't get tightened back down good enough when you put the je50 vaf in
Quote:
Originally Posted by JoeyV
im a gay drinker, i have sexy/fancy drinks with my girlfriend thats it
Double check over you intake and your VAF. Sound like a vacuum leak. Maybe something didn't get tightened back down good enough when you put the je50 vaf in
So I tightened up the blue hose that goes from the air intake pipe to the engine block, but it didn't help at all. I think their might be a problem with the vacuum lines connected to the idle speed regulator, idk. Would that cause jerking at constant speeds? The idle has been completely erratic btw. Also, I just replaced the fuel rails, could any of those vacuum lines creat a problem such as this? I made sure they were tight, but who knows, they might be frayed somewhere.
Are you SURE its the ECU out of a JDM MX6 and not some other ECU? take a picture of it, because I think I suspect whats going on here.
"War is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse. The man who had nothing for which he is willing to fight, nothing which is more important than his own personal safety is a miserable creature, and has no chance of being free unless made and kept so by the exertions of better men than himself." -John Stuart Mill
Are you SURE its the ECU out of a JDM MX6 and not some other ECU? take a picture of it, because I think I suspect whats going on here.
I will, but I can tell you it has absolutely no markings on it, unfortunately . Which did have me worried. L.Machida sold it to me, I do know that the MAF is in fact JE50. Let me double check with L.Machida, however.
Ground yourself, open it up and take a picture of the inside. Even with the outside markings removed the guts should be able to tell more of a story.
"War is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse. The man who had nothing for which he is willing to fight, nothing which is more important than his own personal safety is a miserable creature, and has no chance of being free unless made and kept so by the exertions of better men than himself." -John Stuart Mill
Car:
I have a 95 A-Spec 6 with the J-Spec engine put in.
The History:
A month ago one my fuel injector solenoids went bad, so I decided to replace the lines. I got some in good condition about a week ago and had them installed. It ran fairly good for about the first couple of miles (had a little bit of trouble in the low rpm range) to a friends house. When I got in to drive home it started up great, however in a few seconds it had dropped to 250 rpm and died. The second time around, when restarting it I was careful to rev it to keep it from dying. I was able to pull away from my friends house by reving in neutral and then letting in the first gear, however the car had absolutely no power. Until of course I could get it over 4000, then it took off like a rocket. It got so bad that I decided just to drive it back to the mechanics. They said they would take a look at it, unfortunately at the same time this was going on I had ordered the JE50 and J-Spec ecu combo, and my brilliant dad decided to drop that by the mechanics. Well, what did they do, they took out my a-spec maf (or vaf) and dropped in the JE50, and of course they didn't put the new ecu in. Well after they did this, the car ran fine, except for the fact that it idled between 1500 - 2500...haha (and of course I knew that was because it was exactly compatible with the a-spec ecu). The mechanic then claimed he had fixed it and that the idle would go down once the ecu figured out it had new fuel injectors...wow I guess this is why you never let a mechanic work on your j-spec motor. Needless to say, my dad was convinced the mechanic had fixed it, but I of course knew that all he had done was forced the ecu to pump a bunch of fuel into the cyclinders and had temporarily nullified the issue. I figured the problem would return when I installed the j-spec ecu.
The Problem:
So I installed the j-spec ecu, easy enough. It started up horrible however, and started idling pretty bad, but then revved up and found an idle spot at 1250 rpm. I assumed that this was the ecu getting used to my engine. After a few minutes I took it for a test drive, I didn't really push it, I got over the 4000 range once. For the first mile it ran great, then it the engine started jerking and when i came to a stop it was idling horribly. trying to start engine, the engine just had no power.
So that brings me to today, 3 days later. The engine still starts up horrible and idles horribly, then it corrects itself and brings the idle to 1250 rpm. And whether hot or cold, for the first mile runs great. However there are to things that happen later on in the drive. If I decide to drive aggressively, the car pulls excellent for the entire drive as long as I continue to drive aggressive. In fact the car has a lot of power even in low rpm ranges like 2300 (even in fifth gear). However, if I decide to drive normal the car will start to stutter/jerk and the car will often shake. The car also has no power...until, until I bring the rpm's up past 3800 rpm, then the car will take off like a rocket, I i'll tell you its just scary going from no power to full power. After it takes off like this it will run strong for a little while, and will continue as long as i drive aggressive, if I let the rpm's get low however it will revert back to no power mode.
?:
What the hell is wrong with my car??? I had no problems before one of those solenoids went bad, it ran very strong. I'll post a clip of me trying to start the car later today. Please help!!!
Dude it sounds like you have a massive vacuum leak from hell.. Did you ever remove the intake manifold? Try running your engine and then spray the [shizzle] out of it everywhere with a can or 2 of brake cleaner and see if it choke's and dies. You should be able to pin point out the spot it's leaking from by doing this.
Spray around the intake manifold and down by your injectors.
The intake. (everything past the VAF)
Try to get all your vacuum lines.
I hope this can help you out.
Quote:
Originally Posted by JoeyV
im a gay drinker, i have sexy/fancy drinks with my girlfriend thats it
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Weird Problem with 2g KLZE
Will post if I have any problems.
\\\9N9///Autometer, AWR, Clutchmasters, DNX, Iequus, K&N, Ksport, Mystere Motorsport, NGK, OBX-R, Outlaw Engineering, PRD, Probinator chipped ECU, RR-racing, Royal Purple, Topline
. Which did have me worried. L.Machida sold it to me, I do know that the MAF is in fact JE50. Let me double check with L.Machida, however.
