98 3800 random missfire and smoking
Thread Starter
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Newbie
Joined: Oct 2009
Posts: 7
98 3800 random missfire and smoking
ok guys first post not new to the 3800 community, have 2 gp's, and have had 3 Bonneville's 
had to replace lim and uim on all of them .the symptoms of this car are hard starting (fouled plugs ) smoke out the exhaust (af burning) .the water pump leaks and it has a miss. the oil has a bit of a gas smell, i would think from hard starting. can any one tell me if this points to a bad lim or uim. and i have read some on here to find a sticky about the procedure to do this on the camaro. so if someone has a write up about this or maybe a ideal that this is where i need to be looking i would be grateful thanks
had to replace lim and uim on all of them .the symptoms of this car are hard starting (fouled plugs ) smoke out the exhaust (af burning) .the water pump leaks and it has a miss. the oil has a bit of a gas smell, i would think from hard starting. can any one tell me if this points to a bad lim or uim. and i have read some on here to find a sticky about the procedure to do this on the camaro. so if someone has a write up about this or maybe a ideal that this is where i need to be looking i would be grateful thanks
1st Gear Member
Joined: May 2009
Posts: 200
From: Fort Wayne
there should never be any gas in the oil. the smoke could come from the oil burning because the gas is in it. i would look into an oil change and start it up and run it for a little bit then check the oil again to see if there is gas in it. i dont think these have anythin to do with a intake mantifold. if the water pump has a leak, check out where its leaking from, if its coming from the gasket then replace it. also, change the plugs!!!
Thread Starter
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Newbie
Joined: Oct 2009
Posts: 7
well yes code po102 mass-or volume flowA circuit low . code po125 insufficient coolant temperature closed fuel loop, and po300 multipile random misfire. car is very hard to start, worse when warm misses, and burns fuel like crazy.
1st Gear Member
Joined: Aug 2009
Posts: 285
From: Henderson/Las Vegas
well my car just pulled the p0300 code yesterday tomorrow i will be attacking plugs and wires and coils depending on how they all look.... when my car first pulled mass air flow i replaced cleared code and it came back... my car also had a very hard start didnt idle missed through open throttle etc.... i did a pin test on my ecu and it ended up being bad im not saying that is your problem but its something to keep in the back of your mind. my first suggestion is to change what you know is bad and go from there to see if there is any improvement