kwiktsi

Ok, 3 days and counting with driving the FD. I noticed for the first time today that when I started it in the morning, it was spewing black smoke and smelled horribly rich- every time I hit the throttle, it would just dump black smoke out he muffler. It normally has a bit of oil smoke due to the turbo seals leaking, but I have never noticed fuel like this. After warm up, the smoke subsided, but it still smelled horribly rich for the rest of the day- even my clothes smell from driving it!!! My Map sensor is plugged in and and the vacuum line it good. The car seems to be running fine, just smells . Anything I should check for? I don't have a CEL on or anything. I am wondering if the coolant sensor is crapping out? Where is it located on these cars? Thanks.
Joe

kwiktsi

bump

kwiktsi

Anyone???

lopedl

iTrader: (1)

Have you recently taken your manifold off? Check the wiring especially behind the IM in the rear, were the wires connect to the throttle position sensor. If any wires are broken off or shorted out to your sensors it could cause your car to run too rich, because the computer would be playing guessing games.

FDjunkie

Have you check the ecu for error codes?

kwiktsi

Actually, I lifted the UIM to check the vacuum lines under it the other day, but it was running fine for days afterwords. I will check that though- good idea . Would that make it dump fuel at startup though? That is the odd part- I start it and it blows a bunch of black smoke and every time I hit the throttle it just puffs more black smoke out and pops once or twice as the revs come back down- WAAY rich . I will check that stuff though.

To answer the next question- no CEL on, so I would assume no current trouble codes. How do I pull them to check? Thanks.
Joe

twokrx7

iTrader: (1)

Check the air intake temp sensor connection, on the bottom of the UIM.

kwiktsi

Map line is good, I will check the IAT today. I am also starting to wonder if it has a leaky injector- it runs great though, just odd that it blows so much smoke on the first start up for the day. Thanks.
Joe

Mahjik

iTrader: (1)

There are some codes which will get stored by the ECU but will not turn on the CEL. Check this link as it will tell you how to pull the codes:

http://www.scuderiaciriani.com/rx7/engine_codes.html

It might or might not help but it's good information to know.

kwiktsi

Thanks!!! I was hoping you and your infinite wisdom would post here . Thanks.
Joe

kwiktsi

You know what just hit me- like a dipshit, when I went non-seq and installed my MBC, I removed the two solenoids for the wastegate and prespool. If they are out of hte loop, would that put it in any kind of limp mode or anything and dump excess fuel?
Joe

Mahjik

iTrader: (1)

I don't think the ECU would put the car into limp mode because of those. It would be easy enough to check since all you would have to do is plug the solenoids back into the harness (or stick two resistors into the wiring harness connections).

Have you had an oil change or anything oil related lately?

kwiktsi

Nope, nothing oil related. I am going to put the solenoids back in for the hell of it. I just thought of that because while reading the list of trouble codes from that link you gave me, I saw that they have codes for the solenoids listed there. I know most "older" (pre-OBD2) cars I have worked on don't do anything with them unplugged, but seeing them in the code list, I figured it was a possibility. What made you ask about oil changes? I've only had the car a couple weeks now and it has only been on the road since Friday and had to get the turbo situation straightened out fist, now I am getting more time driving it and am seeing a few little quirks here and there. The rich thing just started on Tuesday though, never did that before. And the more I think of it, Monday was the day I pulled the solenoids, so it kind of fit. Oh well. Is it normal for them to run that rich with no cat or is it still excessive?
Joe

Mahjik

iTrader: (1)

The reason I asked about the oil is I have seen people overfill their cars and turn them into movie scene smoke generators. Just making sure that wasn't the case here.

If it started after you did some work to the car, I would just go back and browse the areas you were working on. It's not hard or uncommon to bump or knock something off in the small spaces you find yourself working in most of the time.

You shouldn't be blowing smoke out of the car. You might have a little condensation coming out of the exhaust in the mornings but that should be it. Any other smoke is a problem, just hopefully for your sake not a big one. I would start with rechecking your work. If you still don't see anything, post back and we'll see what we can come up with.

su_maverick

so if someone overfills the oil in your car it will lead to alot of smoke? My oil pressure is just a tad higher than normal (about 5) and every time I start the car it will smoke. It is just white and not very thick but it still does it. I have read about every post on it and people have said varrying thigs
a.) O-Rings on your turbos
b.) its normal, dont worry about it
c.) some of the oil is being ejected from the turbo (the oil you can see in the intake piping for the primary)
I would like a confirmation on this. Should I put new rings and gaskets on the turbos or just get a oil catch can?

afterburn27

iTrader: (5)

The solenoids might be your problem, when I installed my MBC's, I unplugged all the hoses, but left the electrical connections plugged in thinking that it might do something to the computer.

MR_Rick

iTrader: (7)

did you removed the air pump?

kwiktsi

Doph.. I forgot about that . But without a cat, would even make a difference? I thought it would only make a difference with a cat on there? I forget which point I took it off at though, I thought it was already off when I started to drive it. Actually, I am certain it has been off for a few days now.
Joe

andre sinclair

iTrader: (36)

check the map sensor vacumn line leading from the sensor to the back of the throttle body.

kwiktsi

Thanks, that was one of the first things I checked .
Joe

MR_Rick

iTrader: (7)

The reason I ask is because my car has the same problem that yours does. It all started when I removed the air pump. I have heard that when you remove the air pump the car runs rich at idle.

kwiktsi

Hmm.. I know it pumps air into the cat at idle, but without a cat, I didn't think it would make a difference. Anyone care to chime in ? Does your car have a cat on it still or no?
Joe

MR_Rick

iTrader: (7)

Kinda. my car is running so rich it already cooked the cat.

Mahjik

iTrader: (1)

The idle is lumpy with the airpump removed on a stock or rechipped ECU (so you increase your idle rpm a little higher). However, it won't cause smoke to start billowing out of the exhaust.

MR_Rick

iTrader: (7)

I don't have lumpy idle all the time. On my first FD I had the same problem when I disable the air pump. I just remember this too. I though it had something to do with going non-seq. but the old one did it too. I think this is why you need to adjust the tps.