Dudemaaanownsanrx7

iTrader: (23)

how does the car drive without going into boost? so you dont have any trouble codes on the ecu anymore? have you checked the codes again recently?

vc311

iTrader: (1)

i dont get 10 psi because i get about 5 to 7 psi with the non sequential system(not controlled by ecu). i think im might be having an ignition issue. i already replace the plugs. but ill test them anyway. also, my map sensor filter is fine. ill keep an update soon. thanks ......

twomucboost4u

iTrader: (9)

Your doing all of this on a stock ECU? I bet its just tuning if it works ok with partial throttle and starts to jerk with heavy load when its dumping all the fuel and its getting floaded... you have to remember the stock factory mazda ECU works of variable which it believs never changes... So it could be dumping fuel at low RPM thinking tis got its sequential system working adn it need fuel when it fact it doenst... Just a thought... Also why are you not running the stock factory solenoids for the boost?

Chris

vc311

iTrader: (1)

well here is the thing. I did the same exact work to a friends 93 fd (to go poor mans non sequential) and his car runs solid .it gets about 7 psi and thats with the wastegate not being controlled by the ecu. so therefore my car should run like his. but , before i went non sequential i already had my hesitation issues . these hesitations are slightly in vacuum , 0 psi,and above.these hesitations come on in neutral and every gear. i already tested my fuel system and it tested good. now im going to test out my ignition system to see if im getting good spark. i replace my spark plugs like 500 miles ago , but ive read on this forum that spark plugs have gone bad on some in less than a thousand miles .(weird) so ill keep an update on this crazy *** issue

fendamonky

iTrader: (6)

Ok.... so you were having boost issues before you went non-seq, now you're confused as to why you're still having boost issues + other problems to boot?

I may be wrong, but I'm thinking the problem may have been something *other* than the sequential control system all along, and you (or your tuner) just mis-diagnosed it. Hence why you are still having issues.

Just a thought after skimming through...

Have you taken your car to a reputable specialist for a diagnosis???

Dudemaaanownsanrx7

iTrader: (23)

converting to non sequential in itself will not cause the issues he is having. even on the stock ecu it will run fine.

If the problems were there all along then its something other then the turbo system. if it happened after going non sequential its most likely something changed or not hooked up correctly. Check the ecu codes and go from there. If the solenoids were removed for instance without adding resistors problems would come from that.

fendamonky

iTrader: (6)

As I understand it he went non-seq b/c of trouble boosting correctly. Now he is still boosting incorrectly (or too slowly) with other additional problems. I'm just suggesting that maybe the current source of the problem is the same source which showed trouble before the swap..

For instance, this time last year I wasn't boosting to full psi on my primary turbo. Figured the turbo's were going out, so I bought BNR's.. got them installed and still wasn't making over 11psi on the primary turbo. I checked the check valves/solenoids and sure enough! Stuck and/or failing..

So I misdiagnosed my inability to attain full psi as faulty turbo's, when in fact it was the check valves/solenoids.

I'm no pro on the non-seq process (if I wanted that than I'd just go single) though, so I'm not entirely sure what stays, and what goes..

vc311

iTrader: (1)

well, most shops around here that do work on fd's wont touch my rx-7 and thats because they only want to work on completely stock rx7's or they will just do it the easy way and go with their preferred engine management system but damn$$$$$$$$$...im just trying to atleast have it running solid like it should run with the stock ecu. also, my error codes are relief 2,egr,aws and im sure these dont affect the performance of the car because ive seen fd run solid with these systems removed.

vc311

iTrader: (1)

so i tested all of the remaining sensors and they are fine. the only system left to test is my whole ignition system. if it tests out good then ill just have to come out the pocket and take it to an rx7 fd3s performance shop to fix my trippy issue. thanks .....

Dudemaaanownsanrx7

iTrader: (23)

i can't remember if the relief 2 will cause limp mode or not. I think it might, but its been awhile since i have ran the stock ecu.

The other cars might have had resistors or a different ecu, the stock ecu is more temperamental about sensors not being hooked up

vc311

iTrader: (1)

well my car ran fine (on the sequential system) with these error codes. also, i even had a fuel thermosensor error code,which some on the forum say will put your car into limp mode, but it didnt. furthermore, i fixed the fuel thermosensor by rewiring from one clip to the body harness clip that goes to the ecu and it was fixed. so im sure the remaining error codes wont put my car in limp mode.ive actually experienced limp mode and it was way different . not cool.....

vc311

iTrader: (1)

ok so now i removed all of my error codes and it turns out my car still has the same hesitations on vacuum and under load. so it turns out that i was not in limp mode from trouble codes: accelerated warm-up system,egr, and relief #2 . ive tested everything on this car except for the crank angle sensor. im going to test this out and ill keep an update on this issue...

vc311

iTrader: (1)

ok so i am still having these crazy hesitation at exactly 0 psi at any rpm and any gear. its like a hesitation based on load . i can only drive the car if i give it ease on the gas pedal.if i try to just step on it, the car hesitates and starts to jerk violently with afterfiring from the exhaust. sometimes if i get passed around 5200 rpm or so with ease on the gas pedal, i can get the car to go into full boost ubruptly (7 psi w/ non sequential) only with ease on hte gas. what could cause this? i have no trouble codes and im not in limp mode.also, i dont have a vacuum or boost leak. this hesitation is based on load and throttle response .it might even be some kind of ignition issue.furthermore, my hesitations started before i went poor mans non sequential .also,i did my friends fd non sequential exactly like mine and his car boosts fine so there is nothing to blame there for my hesitations. there is not much else to test out,not to say ive tested every little thing.but , something failed and im going crazy tring to figure this out. so please does anyone have anymore ideas on what to test........

WaachBack

iTrader: (21)

Get rid of your stock ECU. PFCs are so cheap now days. It's a common sense upgrade.

mad_7tist

tps, map sensor, fuel pressure...

Dusted RX

It may be a long shot but have you checked your battery? When I lost a cell in my battery the car would buck if I gave it more than about a quarter throttle.