White smoke super rich? - Third Generation F-Body Message Boards

maxblaster · 09-06-2009, 01:24 AM

Here we go picked up 91 RS 3.1 T-top 500 guy lost key and couldn’t get it to start no matter how many wires he cut, spliced or jumped! So after a week of tracing and repairing the poor harness and running through the different key values she cranks. But still no start a shot of starting fluid and she springs to life so I have a fuel problem. New fuel pump, filter and regulator she will spit and sputter but that’s it. So now I’m off to the ignition. New cap, rotor, wires, plugs, coil and control module to no change. Now I test the injectors three are bad so I get a full set of accel 19 lbs now the beast is alive running like crap but she is running set timing and still crap. Replace all the vacuum lines so now she purrs like a kitten. But yet one more gremlin pops up fan will not engage put a jumper in the relay socket and the fan works, so I assume sending unit replace them both and the fan will not come on but with the a/c running it will, I cant figure this one out so I trace out the ground from the ecc to the relay and tap into it for a dash mounted toggle fan works when toggle is on or when a/c is. Two weeks of great running went out to go to work and no start but the smell of all the fuel coming out the tail pipes was like I pored a gal on the ground. After work same thing retarded the timing and she started running like crap and blowing a ton of dense white smoke and super rich smell. Running after the retard lead me to believe timing chain might have jumped a tooth got everything pulled off timing marks are dead on chain real sloppy so on with a new one. So with the fan problem and now this would the Engine Control Computer be the next step or have I over looked something? Sorry for being so long winded but the devil is in the details right? lol

This ad is not displayed to registered members.
Register your free account today and become a member on ThirdGen!

enswrob · 09-06-2009, 04:11 AM

white smoke check the oil. could be a blown headgasket.

Maverick H1L · 09-06-2009, 07:43 PM

Simply put, white smoke equals engine coolant in the cylinders. Black smoke means too much fuel. Blue smoke means you're burning oil.

Check to see if everything is okay with the knock sensor... That is what tells the ECM that there is a spark knock and to retard the timing. Also, with all of your cooling fan troubles, I would also try a coolant temp sensor and/or connector.

AM91Camaro_RS · 09-06-2009, 11:19 PM

Yeah, white smoke must be water in the combustion... as for the fan, how hot did it get while you were watching for it to come on? I'm wanting to say that they're set to come on at 195 stock. I might be off on that, though. But also, if it did get hot, that may have contributed to your white smoke problems.

maxblaster · 09-07-2009, 05:40 PM

Well I put three new temp sensors and one connector (the two wire one in the intake) the one wire sender fixed the gauge with the first new sender.

On the smoke I’m just not 100% sure its coolant after changing the timing chain put everything back together pulled the plugs from side of block to drain as much coolant as possible. I was able to get her running and ran it for about a min the amount of smoke never changed and the smell isn’t the sick sweet I’ve smelt in the past but rather a super strong gas smell. While it was running during my little test I thought I would check the timing with the timing wire disconnected I could get it to 8 or 12 but every time I got closer to 10 it would radically jump high or low and could never get it to set in one spot. And keep in mind that I had been driving her for just over two weeks with no problems at all not even a trace of smoke white blue or black.

While testing the fan I let the temp get to 240 before jumping the relay to cool it down to 200 before shutting her off.

Maverick H1L · 09-07-2009, 09:58 PM

Fan is set to come on at 235 degrees factory. The thermostat opens at 195, or it should. Yes, white smoke means coolant. However, if the exhaust smells strong of gas, it should be black. Just so you know, there are 2 temperature sensors, one for the gauge in the driver's side cylinder head, and the ECM sensor right next to the thermostat housing under the throttle body.

Also, jumping time when you're trying to set it is an indicator of a failing ignition module. I had that problem when I first bought my car. I'd get it close, and then it would jump back up to around 18 BTDC.

I'd put in a new CTS (2 wires, the one by the thermostat) first and see what happens before I tried messing with my ignition timing.