[calgarynotch]

ever since i got my car it has had tons of problems with stumbling idle and rich condition so i cleaned the idle controller,cleaned the air temp sensor,cleaned the maf, replaced the coolant sensor, replaced both o2's, set the timing to 12', resealed the upper and lower intake (typhoon) cleaned the contacts on the salt and pepper shaker plugs, reset base idle, reset tps to .93 and after all that i never got an engine light yet it was still rich. now after removing the a.i.r. solenoids and switches and a bunch of vacuum lines, as well as no apparent leaks im getting codes 41 and 91. along with the 33 egr fail code which ive been told wont affect drivability. the egr is still hooked up. but it will burn through a tank of fuel so fast that its getting almost annoying. i pulled the plugs and i can tell its running rich. very little brown on the plug. it has headers no cats and a few other things done.

can someone please tell me why it can be blowing faint black smoke out when i stomp on it then throw a lean code when i run it through the gears? even at idle its got a very gassy smell. and im not sure if its the tilted angle of the exhaust or the magnaflows but there is no condensation coming out the exhaust.

sorry for the heavy post but any help would be well appreciated

[calgarynotch]

anyone?

im leaning to bad wires or maybe fpr. it has a stock fuel pump also. im not sure if i need to upgrade

[1slo5.0]

- Check to make sure the Oxygen sensor ground wire is still attached to the firewall and has a good, clean connection. This is an orange wire that comes out of the engine wiring harness and attaches to the firewall.

- Check for vacuum leaks. The 41 and 91 codes can be caused by a vacuum leak. Being that you have one of those chinese intakes, a vacuum leak is very possible.

- Do you have a stock mass air flow sensor?

- What is the fuel pressure at?

The system detects the lean condition and dumps more fuel in which is why it is running rich now. That is normal. That is the computer protecting your engine.

[calgarynotch]

I have no idea what the fuel psi is. I think its time for an adjustable regulator with guage for sure. The maf is stock. And idk I'm pretty sure I don't have any vacuum leaks.it has all new gaskets. And I put a nice fat bead of silicone between the upper and lower. I'm stumped

[1slo5.0]

Originally Posted by calgarynotch I have no idea what the fuel psi is. I think its time for an adjustable regulator with guage for sure. The maf is stock. And idk I'm pretty sure I don't have any vacuum leaks.it has all new gaskets. And I put a nice fat bead of silicone between the upper and lower. I'm stumped

New gaskets doesn't mean shit with that intake. Those chinese pieces of shit have the poorest machine work I've ever seen. Get yourself a can of carb cleaner and start spraying the mating surfaces of the intake. If the idle speed increases then you have found a vacuum leak.

If you have a friend with a Mustang see if you can borrow his MAF......just to rule your MAF out as the problem.

[calgarynotch]

i think that's a good idea. i guess when the previous owner had the engine out a lot of the wiring wasn't put back in place properly and maybe that orange (bad color for a ground) is not hooked up right. could i have a leak at an injector hole? a few of them were pissing fuel before i pulled the intake off and turned and bolted them down better. where does the 02 sensor wiring route normally? and also does the little box that suppost to be on the firewall have to be grounded? cause its just laying there behind the intake right now.

sometimes it weird how my car will intermittently pull alot harder like when im driving on a rough calgary road downtown and mash on it. im also wondering if my maf is too small for my mods and if i should upgrade to a bigger fuel pump?

[1slo5.0]

Originally Posted by calgarynotch i think that's a good idea. i guess when the previous owner had the engine out a lot of the wiring wasn't put back in place properly and maybe that orange (bad color for a ground) is not hooked up right. could i have a leak at an injector hole? a few of them were pissing fuel before i pulled the intake off and turned and bolted them down better. where does the 02 sensor wiring route normally? and also does the little box that suppost to be on the firewall have to be grounded? cause its just laying there behind the intake right now. sometimes it weird how my car will intermittently pull alot harder like when im driving on a rough calgary road downtown and mash on it. im also wondering if my maf is too small for my mods and if i should upgrade to a bigger fuel pump?

The orange wire normally connects to the firewall or to one of the cylinder heads or intake.

I'm not sure what little box you are talking about. Can you take a picture?

The stock MAF is too small for the stock engine. It is a beneficial to upgrade.

[black89GT]

Originally Posted by 1slo5.0 The orange wire normally connects to the firewall or to one of the cylinder heads or intake. I'm not sure what little box you are talking about. Can you take a picture? The stock MAF is too small for the stock engine. It is a beneficial to upgrade.

anything else required to do when u upgrade the maf? or no?

[1slo5.0]

Originally Posted by turbofoxbody anything else required to do when u upgrade the maf? or no?

No.

[calgarynotch]

Well that ground wasn't hooked up so I hooked it up and noticed its not as rich and its only throwing the 33,41,91 codes for egr and a.I.r.which isn't hooked up. It still blows a small amount of black when I stomp on it...I'm pretty sure it shouldnt do that. It seems to be lacking a little as well