Finally BOOSTED!!!
- Thread starter smp3000
- Start date
TurboDog's Dad
Member
What you want to make sure is that the additional fpr isn't adding fuel at idle. Stock fuel pressure should be 39-45 psi. 1st mp3, remember that every electrical load translates into more hp required to drive the alternator. Also, the a/c isn't so much an electrical load as it is a parasitic mechanical load, it takes several hp to drive the compressor. All this being said, mine never stumbles air on or off. Perhaps it's related to your goal of losing your hearing? ;-) Wait 'til you're old like me....
Does the FM kit use any check valves in-line with the FMU? I was curious if that would help. I was using a Vortech 10:1 FMU. Right now my car is just generally running like total s*** though. I guess running out of oil on the way to work will do that to a motor though.
I'm saving up for new piston rings and rod bearings and maybe a new main bearing. I've never don it on a 4cyl, but if it's anything like replacing these items on a V8 I think I'll be ok as long as I use linuxracer's shop manual. Now if I can just find the time to do the work.
I'm saving up for new piston rings and rod bearings and maybe a new main bearing. I've never don it on a 4cyl, but if it's anything like replacing these items on a V8 I think I'll be ok as long as I use linuxracer's shop manual. Now if I can just find the time to do the work.The Plot thickens.
It would seem that this issue is only found on the MP3's.
Both Corky and FM used P5s as testers an dhave seen no problems.
This is getting irratating since the kit was marketed as for the MP3 and that is the ONLY car consistanly having a problems with it. Like I said way at the beggining of this the P5 and the MP3 must have a lot more things different then simply the timing and muffler.
I wouldn't typicly be so upset but the damn thing almost got me killed this weekend!
Also it would seem that simply swapping ECUs will not get rid of the problem on an MP3 and it will not create it on a P5. Thsi quetion I guess is best left to PortCityMP3 to see if he has an idle problem also.
As far as my car goes. 1 it never almost stalled from the audio system before the turbo and the A/C makes more sense know becuase everything belt driven seems to have problems. The power steering seems harder to deal with and can randomly pull the car while not accelerating. Bakes also seem to over stress the car when used causeing idle problems.
It would seem that this issue is only found on the MP3's.
Both Corky and FM used P5s as testers an dhave seen no problems.
This is getting irratating since the kit was marketed as for the MP3 and that is the ONLY car consistanly having a problems with it. Like I said way at the beggining of this the P5 and the MP3 must have a lot more things different then simply the timing and muffler.
I wouldn't typicly be so upset but the damn thing almost got me killed this weekend!
Also it would seem that simply swapping ECUs will not get rid of the problem on an MP3 and it will not create it on a P5. Thsi quetion I guess is best left to PortCityMP3 to see if he has an idle problem also.
As far as my car goes. 1 it never almost stalled from the audio system before the turbo and the A/C makes more sense know becuase everything belt driven seems to have problems. The power steering seems harder to deal with and can randomly pull the car while not accelerating. Bakes also seem to over stress the car when used causeing idle problems.
TurboDog's Dad
Member
There aren't any other differences other than the ecu and exhaust. I'm running an exhaust at least as large as the mp3 piece, so that's not it. Take a look at the fuel pressures as I suggested. What do you mean that your ps "pulls" the car? You lost me on that one. Big Ben, we use a check valve on the outlet of the fpr to prevent it sucking air and on my car I'm using a small restrictor in-line with the fpr to cut delivery a little. How much boost were you running that blew you up? People within Mazda say that 10 is the absolute max for these engines, anything over and the cradle flexes, followed by SPDS.
The brakes are a totally stand-alone system I believe. This shouldn't give you any idling problems. I know the MP3's ecu also has more fuel flow for the advanced timing. Maybe that is the problem? I can see the AC giving an idling problem, but if your stereo system is giving you idling problems, you just have one huge system!
My suggestion is to go over your vacuum line system with a fine toothed comb and go over all your charge pipe plumbing again and again. This is usually where the problem is found. Maybe someone can test the car with the MAF between the turbo and the throttle body instead of in front of the turbo. I doubt this would work, but you never know.
Me to, You always seemed to get the worst of a problems.LinuxRacr said:I hope the fix is found before time to install my Turbo comes around.
I just wished someone else with a stock engine was close to either BEGI or FM so they could work on and MP3.
TurboDog's Dad
Member
The brakes are vacuum driven, so you can see small fluctuations in idle in almost any car if you sit at a light and pump the brakes. Should never be enough to actually cause an issue, just maybe noticeable if you try to make it happen.
Heres a quote form NJaremka
according to the workshop manual, 1569 is a fault from the VTCS sensor. the mp3 doesn't have one, does it? so swaping the ecu with the protege5, which does have the VTCS, the ecu is looking for the VTCS solonoid. since the ecu can't find it, it threw the code.
This to me would be a difference. Also the powerer steering cooler line is different on the MP3 then on the P5. I still believe there may be more differences that have not been seen yet.
The Power sttering issue is very wierd. SOme days its fine. others it seems like its a battle to keep the car on the road. It gets rather diffucult to hold the car on the road if it crowns slightly. The car always has been sensitive to te road and pulls in the direction of a slant in the road but this is extream.
Example. going passed exit 3 in Salem on 93 the road crowns slightly on each side. One day this crown caused me to have to apply an unreasonble amount of force to hold the car straight. Not that I was battling with it but it was took more force then ususal. The next day I again had to travel this road and it was fine. The only difference I know of was that onthe day I had the problem the idle was being erratic the second day it was being more stable.
according to the workshop manual, 1569 is a fault from the VTCS sensor. the mp3 doesn't have one, does it? so swaping the ecu with the protege5, which does have the VTCS, the ecu is looking for the VTCS solonoid. since the ecu can't find it, it threw the code.
This to me would be a difference. Also the powerer steering cooler line is different on the MP3 then on the P5. I still believe there may be more differences that have not been seen yet.
The Power sttering issue is very wierd. SOme days its fine. others it seems like its a battle to keep the car on the road. It gets rather diffucult to hold the car on the road if it crowns slightly. The car always has been sensitive to te road and pulls in the direction of a slant in the road but this is extream.
Example. going passed exit 3 in Salem on 93 the road crowns slightly on each side. One day this crown caused me to have to apply an unreasonble amount of force to hold the car straight. Not that I was battling with it but it was took more force then ususal. The next day I again had to travel this road and it was fine. The only difference I know of was that onthe day I had the problem the idle was being erratic the second day it was being more stable.
That is actually a fabulous idea, Ben, and a quick one. I would encourage someone to try it. It also lends itself to a vacuum problem. However I offer an alternative, one that folks probably dont want to hear:big_ben said:
A general uneven idle I would put up to fuel pressure, injectors, or any number of fuel problems (and about a hundred other non-fuel probs). However, this roller-coaster dip that the MP3's are doing may not be a fuel pressure thing, at least not as far as the FPR/FMU is concerned.
My concern still lies with the ECU. Many of our Mazdas (both 3's and 5's) experience a one time dip at idle, down to 200 for some of us, and at least down to 400 for the rest. This is the ECU "checking itself," and the limits of the fuel (think timing) being used. It sometimes happens if one stops to idle quickly after a long period of hard, high-rev driving, as the ECU steps down. I am concerned that this idle dip is still ECU-related. Someone mentioned that swapping ECU's doesnt solve the problem, and this could be because the ECU is (duh) designed to fit in only one model only, so swapping would not fix the ignition/ECU communication problems we seem to be experiencing.
I believe it is the ECU checking itself. It would be super-duper helpful if we could get someone with a ECU piggyback system (Greddy people, I'm looking at you) to see if they're having the same problem. If it is the ECU, then of course the emanage or similar piggyback product should solve it.
I just dont think it's fuel pressure because of the dips. Fuel pressure should cause a more "constant" idle problem, meaning a much rougher idle as opposed to uniform dips, which to me indicate a computer.
On the flipside, the stalling is a sign of FP problems. But I guess that could still be FP problems with an ECU source.
Just throwing it in there, I wish I had an MP3 turbo so I could see for myself. I cant really know what you guys are going through, and I'm really sorry to hear about the problems.
The reason I mentioned the brakes is becuase the car will stall when braking hard after using boost. If I use full boost for a few seconds then shortly there after have to slow down to a stop, then I feel, as I decelarate, the powersteerig cgetting harder to control and the the idle will plumit to 200 RPM or stall all together. Once agin the stalling had stopped since I turned up the idle point but the idle will still fall very low almost stalling th car. Also I have been speaking to Corky alot about it. I have determined there are no air leake since I blocked the MAF and the bellows collapsed and the car stalled, thus no air entering the system after the MAF. Also the idle vacuum is about 20 or 21.
I have actualy found to ways. their is a allen heas screw below the throutle body secured with a nut. You can loosen the nut and tighrten the allen head. also on the side of the trottle body by the firewall ther is a recessed phillips head screw to Adjust it also.
