razorback

while helping my friend rebuild his motor he had his injectors cleaned. i put them back in, which i thought were the right slots (prim-prim, secondary-secondary) but since then his car has been acting odd. really rich at idle then it clears up about 3krpm. anyway i mixed up the primarys and secondaries and thats what causing his problem? is that even possible and what would the symptoms be?

thanks.

Rocking Rotary

iTrader: (14)

I know the injectors with the red tops are the secondays so if there in the primary spot they would be flooding the engine. If you have a PFC you can ajust them but you may run lean when the secondarys kick in becouse they are only 550cc's. If you want you could just change out the secondary's for another set of 850's too. if you didn't want to ripe the engine down that far again. That is if you have a pfc, i dont think the stock ecu can work with diffrent injecors.

razorback

he has the stock ecu and a pfs purple computer. i hope this is whats wrong with it. if its not then we have no idea whats going on with his car. i know its running really really rich at idle. so that is what made me think i may of switched the injectors up. he is going to check it tuesday and see for sure.

Trexthe3rd

It may also be caused by a faulty FPR (not dropping the fuel pressure properly) at idle.

razorback

how do you test the fpr. thats the other thing he was going to test. thanks

(if it matters, he has id say medium street port prim, and large secondary ports, his fuel system is right at max for his setup.)

thanks for helping guys.

poss

iTrader: (5)

I don't think that the 850s will go into the 550 slot without modification, so you probably don't have them mixed up.

razorback

i didnt think they could, but i forget, ill also tell him to check his connectors, they may of been mixed up. thanks.

youngin

It's my car razorback was talking about, but I havent had time to work on it yet because I burned my hand with a sparkler bomb on the 4th of July(alcohol and fireworks dont mix). Anyway I was going to work on it tomorrow and see if I switched the connections anywere in that area. I have the stock FPR and I was wondering how I would know if it was bad.

A more indepth descriptions of my problems.....

A fresh rebuild with RA seals and OEM springs with the ports mentioned above. All emmisions stuff removed, dp, gutted cat, RB catback, intake, PFS purple computer, walbro fuel pump, and other small things. Anyway the car is running extremely rich around 5-6mpg . The idle and low rpms under light load runs rich from what I can tell and will hesitate and act like it is missing, but as soon as i give it enough gas that it is about to boost or a couple pounds of boost it seems to clear up and run great. I dont know how it will act under full boast because I have only put about 500 miles on it since the rebuild. I was having some flooding issues but they seemed to go away since I adjusted the TPS which is in spec now as far as I can tell. I have not had a mazda compresion test done, but I have done it with a regular compresion tester with the pin removed so it does not record the highest compresion # and the #s seemed to be around 100 on each face of the rotors. Keep in mind that this is after about 50-100 miles of the rebuild with the harder RA seals. Which from what I have read take longer to break in. Anyway if it is not some type of fuel problem with the car now I have basically run out of ideas on what could possible be causing the problems.

In the near futer I plan on getting a PFC and getting it tuned but I need to buy a set of used turbos or go ahead and get some BNR's before I spend the money on tuning.

new3rdgenRX-7

I have been having a somewhat similar problem. I just had a mild street port engine in my 93 and it wont start because of flooding issues. I have had 2 top mechanics in my region check out the car and they are totally stumped. Although they are not rotary experts because they are rare around my parts of SE Missouri. Closest to me is St. Louis 110 miles, and Memphis 180 miles, which is home to RX7heaven. I have seen many posts just like this one. It has got to be a computer issue, ECU, PFS, or whatever. I am just frustrated because ive been without my seven for 6 months now, and im stuck driving a 2nd gen with no turbo. Has anybody ever found a solution to this seemingly more frequent fuel problem?

razorback

3rd gen, how far from branson, mo are you?

youngin

Well just to let everyone know I think I finally figured out my problem. Either me or my friend switched the injectors around. Everyone thought it was not possible but it happened. I am about to start the pain staking process of switching them back. Wish me luck lol

razorback

it was me, i put the injectors back in the rails when you got them back. so for future reference you can switch the injectors, they went in pretty easily too, because i didnt have to force them in, which is why i thought they were in the right place.

RX7Wishing

You're fired!

youngin

Okay I got the injectors out which wasnt as hard as I thought it would be, but i might have a problem with the 550cc injectors. I attached an image that I edited from witchhunter.com's site. The part i circled is still there but it is somwhat smushed togather. I was wondering what affacts it would have on the injectors flow and if there would be anything to worry about if I put them in.

youngin

bump

HDP

iTrader: (2)

Did you think about calling some place that specializes in fuel injectors to find out for certain?

new3rdgenRX-7

razorback, im about 4.5 hours from branson. I was just there the week before on vacation on Table Rock lake.

razorback

i live like 15 mins south of branson (if that, really close)

ok, have you had your injectors cleaned? you said you have a standalone? if you do who tuned it?

new3rdgenRX-7

Nope i dont have a standalone. Just had a new street port put in from atkins in california. Local se missouri installed it. It is now at Lou Fusz Mazda in St. Louis. Injectors were checked and they are fine. Almost every mechanical part has been checked by 2 different mechanics. So i sent it up to St. Louis to a well-known mechanic, and im gonna have them check the electronics part. Im not to familiar with ecu, map-sensors and stuff like that. Im only 20 and Ive only had the car for a year, and only had it running for 6 months It is a 12 year old car, but there is only 35k original miles on the car so there shouldnt be to many mechanical problems. I think it just a programming issue, car flooded out after 30 secs of running, hasnt started since. Tried all the unflooding tricks too. If you have any ideas of where to look next that would be great, but like i said im lost when it comes to the electronics end.

new3rdgenRX-7

I stayed right off 270, 10 miles south of Branson, at Edgewater resorts, right on Table Rock Lake. Very beautiful. Wish i could have drove my car down there.

razorback

next thing id suggest is check the fpr, and check the injector connections to make sure they werent switched (ie primary to secondary, secondary to prim etc) also check to make sure the injectors arent switched if the connections are right.

and you were probably about 5 mins from my house. i live really close to table rock lake, literally 2 mins from the border.