therx7guy666

my rx-7 has been sitting for 6 months (just at my house) i finally got it running yesterday thx to kent ^_^... but no thx to my friend who decided to be smart did a donut at 6000 rpms not even an hour after running when he pressed the clutch the rpm's stayed up but slowly decreased i told him to turn the car off when he did it kept running for a second and backfired louder than most guns..>< now when she runs i hold the gas down to about 3000 to keep it running but after 30 secs or so it just chokes out i can choke it and the rpms go back up for a sec but it smothers it again so i let off but it still dies even with the gas down even if i let off or give it more gas... i only have leading firing...it didnt run at all till i bought new bosch platinum plugs... my dad thinks the back fire may have knocked the timing off or the battery fell over shorting something because i dont have it tied down... any ideas as to what is wrong???

djessence

proper grammar and paragraphs or seperate lines are your friends(for example. she runs i hold the gas down to about 3000 to keep it running but after 30 secs or so it just chokes out i can choke it and the rpms go back up for a sec but it smothers it again so i let off but it still dies even with the gas down even if i let off or give it more gas.)

But anyways
Most things are on a fuse so check them to rule it out but it does not sound like thats what would be causing this.

Leading is all you really need for it to run, trailing being mainly for emissions but clearly there is a problem there. Double check both ignitors work. There is a test on here somewhere.

If you think timing could be off (which IMO would take one hell of a bang, but you never know) then double check that its correct....

Secure your battery....

mazdaverx713b

iTrader: (91)

first off, get those bosch plugs out of there and get some NGK's or Denso's.

you'll need both leading and trailing spark for the engine to run properly. that will be your next task. inspect the trailing ignitor box and test per fsm and check the connectors at both of the ignitor boxes.. inspect the timing if you wish but i doubt that its the source of your problems.

next, change ALL fluids and filters and vaccume lines. you may want to run some good fuel system cleaner through the system and rebuild the carb.

finally NEVER let your friend drive your LS again. you have a first gen that was prodcued in a limited quantity. only 1000 aurora white Leather Sports were made. there were 1000 brilliant black made and 500 solar gold. treat the car with respect if you want to preserve its value. and if not sell it to me.

djessence

damn mazdaver beat me to it, after i posted i realized he had bosch plugs in there which = bad news.

Make sure you get the CORRECT densos or NGK's. check the faq for plug numbers

gsl-se addict

iTrader: (3)

I'll try to give you guys more info:

He was having problems with his leading. Tried and tried to get leading working, but no luck. I bypass the ignitor controller box. We got leading working, trailing was not. Probably bad ignitor, but I don't have any J-105s. He did have bosch plugs in there, but I replaced the leading with a pair of used NGKs that I had with me. I only had the 2 with me, otherwise woulkd have switched them all.

We tried to time it, but we couldn't find ANY marks on the pulley. He had replaced the dizzy because the leading pickups were a bit funny. He didn't have any marks and just dropped the new one in. When we couldn't get it going after getting spark, I asked if it had ran since swictching the dizzy. He said no. Then I knew timing was off. I removed the leading/trailing plugs on #1 rotor. I had to feel through the hole to see when the rotor was near TDC as we had no other reference. AFter this, we put a little gas down the carb and she fired up. After it was warm, I adjusted the mixture/idle screws and she was running good. After all that, she would fire up with a touch of the key and purr like a kitten.

This whole ordeal happened after I had left making the 4hr drive back home. I don't have a cell, so they could not call me and get me to turn around and come back. I spoke to Daniel a bit when I got home. The only this that I could think of off hand were:

- big vac leak (maybe brake booster line or in the booster itself)
- throttle sticking
- something pulling/holding throttle (like hot-start assist motor)

I'm not much of a carb guy, maybe some of you guys have some other ideas. I would go check it out, but it is a bit of a drive. I could make another run down there, but it probably wouldn't be for a few weeks. Oh, his 7 is an Aurora White LS. It is a bit rough due to the previous owner.

Bad news: Giant windstorm today knocked down a big tree on top of my garage. The 7 is inside, but is okay. Luckily this house was built during a time when they didn't cheap out on materials. Just damage to a couple windows, trim, some of the sheeting/shingles.

Vashner

If it sat for 6 months I assume you added Sta Bil to the gas right? Get rid of that stale fuel.

gsl-se addict

iTrader: (3)

He drained the gas tank. We put new fuel in when we started it. Could have been some old gas in there, but not much.

mazdaverx713b

iTrader: (91)

it seems that he is getting some good help. i was unaware that he removed the distributor previously. ther should be notches on the pulley where the timing marks would be. i have run into cases where one must find tdc by removing the flywheel inspection plate and using the mark on the flywheel to find tdc. i have hear of this method but have never used it. just heard some guys talking about it a few years back.

i would rebuild the carb. it takes a couple of hours and you have peace of mind after that. remember, if the carb hasnt been touched, you're looking at a carb that has had gas and who knows what sitting in it and running through it for 28 years. thats a long time on a carb.

if you suspect a vacuume leak, start the engine, listen fir the usual hissing. get a can of map gas and crack open the nozzle, letting the gas come out. hold the nozzle close to suspect vacuume leaks. if you have a vacuume leak, the engine will suck in the gas and the idle will raise. or you can use starting fluid. i feel the map gas to be a little safer though.

Kent, make sure he gets all 4 plugs switched over to the BR8EQ-14's or the BR8ET's.

gsl-se addict

iTrader: (3)

We both tried to look for the notches. We could not find them. Maybe the best bet would be to turn the engine to where I think is TDC, pull the pulley off and try to get a closer look to find the notches. Paint them, reinstall, reset timing. It was running good when I left. They were starting on bleeding the brake and clutch MCs when I left. Maybe they knocked something loose in the process.

I told him about the Bosch plugs. I know of at least one guy that chipped the center of all 6 apex seals because of them. I think that the plugs that I gave him were BR9EQ-14 since they were out of my SE. Didn't look closely, though. I just brought them with me so that we could check spark more easily than pulling his plugs out.

I know about the inspection plate thing, but with the rats nest, thermal reactor, carb, etc. in the way, we just didn't have the time.

I wish he was closer. It would be a lot easier. He is about 4hr each way from me. I don't mind the drive or anything, but it really shortens the time available to help out. The guys in that area are having a meet 1 month from now. If he doesn't get it figured out by then, maybe I'll come for the weekend and work on his car and go to the meet...

Kentetsu

The only thing that comes to mind (other than a timing issue) is due to the mention that it seems to be happier with the choke on than off. This was how mine behaved when I had clogged jets...

gsl-se addict

iTrader: (3)

Few other things to mention:

- fuel pump hanging down. He replaced the pump (I think), but is hanging. He said it was aftermarket pump, but I don't know which one. It was quiet. Didn't hear clicking like some of the louder pumps.
- battery not tied down (side post battery)
- has gas in the tank, but not a lot (we put in $10 [3 gallons or so]) in an empty tank
- timing is uncertain, but I think it is fairly close
- choke didn't appear to fully close to me
- no air filter
- rats nest, air pump, etc. all stock

Could have picked up some crap in the tank and clogged a jet or something. It seemed to me when I spoke to him that the idle was high after this happened (like 2500-3000 rpm). When I left, she was purring at 800 rpm. That is why I was thinking big vac leak or something holding the throttle plates open. Maybe he was trying to say that he needed to hold it at 3000rpm to keep it running.

gsl-se addict

iTrader: (3)

Daniel gave me a call. He got it going. Turns out the way the fuel pump was hanging was causing kinking of the fuel line. So it is working pretty good now, I guess. I'll probably still give him a hand marking the pulley, rebuilding the carb, and getting trailing working.

Kent

mazdaverx713b

iTrader: (91)

that would be a great idea. it would be a shame for that LS to not see the road!