Will having injectors cleaned and balanced help prevent the often discussed flooding problems of the 2nd gen? Also is there anyhing else that should be done to injectors if you are having them professionally serviced?

 

Depends on the nature of the flooding problem...
Overnight flooding can occur if the injectors are leaky, and draining residual fuel system pressure into the engine....
If your flooding is because of really weak compression, then clean injectors won't make a difference.. maybe even making it worse because of better flow?

 

Don't have a flooding problem yet since the engine is being rebuilt . I was just curious as to what serviced injectors may bring to the table other than better flow

 

servicing your injectors itself won't fix a leak--the leak comes from the O-rings that you replace when you reinstall them in the engine. Sometimes the O-rings are deteriorated from age, or actually damaged, and they leak. Servicing them only cleans them and matches the set of injectors closely in performance. If you sent a bad injector to be cleaned, RC engineering would call you if you had one that was DOA.

Since your engine is being rebuilt, I would send them out to be cleaned. Only about $100 and you would have them back in a couple days. Problem is--it might be even harder to start at first, since a rebuilt engine has lower compression initially, it would be easier to flood it. In the long run though, you would be better off having them serviced.

 

Thanks! Sounds like good advice.

 

also--do some checking around before you have it done. RC engineering is in California, and you can ship yours there. they will do it for about $100 plus the cost of shipping--you have to provide the shipping envelope prepaid for them to send em back to you. But there are other places that will also do it, and some will for less. RC comes highly recommended, and that is the main thing they do there is injectors. Do a search on here for injector cleaning--someone posted some other places and you will find a list of them. Here--

rich@cruzinperformance.com

Rich Jensen is the guy I talked to there. That is his email. He will do our injectors for $11 each. Also--he tells me that the UPS regular ground ship should be about $8.10 for a two pound package with insurance. Turn around time there is a bit longer--4-5 days recently. If you needed them back faster you could always use next-day shipping but it will cost more. I have been told he does good work but I have not had any experience with him myself--I work too damn much so I hafta pull out the injectors still!!

John

 

Thanks John. Yeah my rebuild is going slow. Only get to work on it over the weekends. I bought the car about two and a half months ago and I just this weekend got all the parts cleaned and started inspecting them. Good news everything looks in really good shape at least visually. Turnaround time isn't a problem. It will be at least another two months until I get the parts I need and get the time to put it back together. But I'm chompin at the bit!!!! Thanks again for your help!

Doug

 

speaking of which.. when i goto fill up my tank, as unscrew the cap, you can hear some pressure fizzle out as it comes off..

is this normal? comments? i also seem to notice the car doesnt like starting in the mornings.. i do have an EGI cutoff switch, so i play with that to get it started but im having trouble determining if its from leaky injectors flooding it, or if its just from that.. morning wakeup..

anyone have any statements on this?

i would imagine if it was residual pressure releasing through the injectors, that in the morning when i twist off the cap, there wouldnt be as much pressure releasing through the cap.. does this seem like a legitimate estimation, or am i way out in left field on that?

 

I sent my primaries out to Rich at Cruzin Performance last week. I will let you know the result when I get them back. For $11, you can't beat it...same service that Marren and RC performs.

 

I sent out my injectors to RC Engineering -- of the four, only one was operating properly. The three others were low on flow, dribbling, or both. (One nice thing about RC -- they give you a computer printout showing the before/after performance -- do the cheaper guys do that?)
However, this has not totally solved my flooding problem in my 87 NA (91k documented miles) -- the car has done it twice since then. Once, it required the whole ATF procedure -- I think that was because I hadn't let it go through the warmup cycle (a no-no). The other time, the car was fully warmed up, but I might have touched the gas pedal when starting (another no-no). That time, I was able to start it by yanking the fuel injection fuses, cranking a bit to clear out the excess gas, then starting it again.
Regardless, I definitely think it's worth getting the injectors cleaned if you're messing with the engine.

 

No prob Doug--let us know how it is going. And keep the questions coming--this forum is the place to get the answers!

 

yeah--Cruzinperformance gives you a printout as well, along with most of the others I have seen. Go to their page and check it out--they basically do exactly the same process as RC does.

www.cruzinperformance.com

Well, gvink, you could always install the fuel cutoff switch. It would just make it faster and easier to unflood it, unless the flooding is severe. Then you may hafta fool around with it more. By the way, have you done a compression test? If not, I would do one. Low compression and flooding are hand in hand on rotaries. The flooding overlubricates the seals, which lowers your compression until you get the extra gas out. But if your comp is low already, that would explain why you have still been having trouble starting it. How long ago did you send the injectors out?

Black13b--the pressure that you find when you take off the gas cap is normal. But--the fuel system has the most pressure build up from the fuel pump, which means that the pressure you are talking about is not the same as what causes the engine to flood. Someone on here tried to say that you could just take off the gas cap overnight to prevent it, but this will not work. I would first do a compression test on yours too--it is about the easiest thing you can do, and it willpoint you in the right direction. If that comes out ok, then I would consider the injector service. Your cutoff switch will only help to fix the problem after it happens, and the injector service can stop it from happening at all. I am installing a cutoff on mine just in case, and I am hiding it so that it can also prevent someone from driving off with my car. Two months ago, someone broke in it and tore up the igniton switch trying to steal it!

Jimmy--let me know how the service goes. As soon as I get the time to finish pulling mine out I am sending them to that place too. Tell us how they do and what their results are on your injectors.

 

skydivr-

a compression test.. of.. the engine? the compression on the engine is excellent, if thats what your referring to.. i tested it last week..

i think tomorrow at work ill ask about injector cleaning.. see what kind of price i can get on one..

 

Listen all ya gotta do to prevent flood is, DONT SHUT IT OFF WHEN ITS NOT FULLY WARM the choke is still on so all ya gotta do is make sure y have good spark plugs and never shut it off untill its warm. Ive never flooded it execpt when it set for 1 month.

 

i dont have a flooding problem i dont think, but it doesnt want to start RIGHT AWAY in the morning.. i dont know if its from a morning wakeup or from leaky injectors or something...

i can ALWAYS get it started, but it takes a little more time than usual, and im using the EGI cutoff to help..

 

I sent my injectors to RC Engineering. I must say I am really impressed with them. An excellent choice to send your injectors to.

 

I got my primaries back from Cruzin, and I'm very impressed. Top notch service for less than half the price of the competitors.

 

ok...so my car has always flooded when i shut it off hot...doesnt flood when cold...but if its hot and i shut it off and try to start it b4 it cools completely it will flood...i have a fuel cut switch which starts it every time..but i always assumed this was due to leaky injectors...am i wrong? i have checked my compression, and it was ok, but i did it wrong and i havent had time to check again (plus im kinda afraid of what i might find lol)...so is this a problem characteristic of low compression?

thanks..
-Pat

 

How do you use your s/o valve? I've seen many diiferent ways of using it... shutting off fuel supply while car is runing until it starves to simply flipping the switch once the car is turned off and then flipping it on after car is re-started.

 

haha Pat just noticed your sig... looks familiar!!!

 

lol yeah... i just use it when the car doesnt start right up, then i flip it off and crank for a couple seconds and when it catches flip it back on. this has worked every time for me...

-Pat

oh yeah its not a valve.. guess u probably knew that, but... all it is is a toggle switch wired into the activation wire for the fuel pump relay.. theres a write up about it somewhere... actually i think i did one a long time ago... but if anybody wants to do it and has ?s i'll help ya...