Cell misfire problem

[David Boyd]

Hey guys I'm new to the DSM world so just bear with me. I recently just picked up a 1995 eclipse gst and I've been having problems with the check engine light. It also has a very slight misfire when I get on the boost. It has gave me codes for the fuel trim and o2 sensor (bank 1 sensor 2) it gives me the fuel trim code one day and the o2 sensor the next so I'm kinda confused on what to do. Also my car is burning fuel like crazy my mpg is terrible. One more thing is my header have about a half inch crack maybe that could cause the small miss? Thanks guys!​

 

[toddrs93]

Hey guys I'm new to the DSM world so just bear with me. I recently just picked up a 1995 eclipse gst and I've been having problems with the check engine light. It also has a very slight misfire when I get on the boost. It has gave me codes for the fuel trim and o2 sensor (bank 1 sensor 2) it gives me the fuel trim code one day and the o2 sensor the next so I'm kinda confused on what to do. Also my car is burning fuel like crazy my mpg is terrible. One more thing is my header have about a half inch crack maybe that could cause the small miss? Thanks guys!​

The header crack isn't going to cause any issue, could be several things still, plugs/wires, mas sensor, fuel issue. Need to have it diagnosed further, looking at fuel trim values and mas readings.

 

[David Boyd]

The header crack isn't going to cause any issue, could be several things still, plugs/wires, mas sensor, fuel issue. Need to have it diagnosed further, looking at fuel trim values and mas readings.

I just replaced the plugs and wires on it. It really just has a bad miss in 3rd gear and when it misses believe me it misses. Then it will pick back up. Also when I'm hard on the boost all I see in my rearview is blue smoke which isn't a good sign.

 

[Mello]

What brand were the plugs you just replace? If they're not NGK plugs then buy these & try again. Stock plugs are BPR6ES & if you get wires I recommend buying NGK's as well. You need a new O2 sensor too.

 

[David Boyd]

Okay do I've been doing some searching. I actually didn't got with the NGK plugs and wires because they were out of stock at the time but what I did fimd is that I think I have a bad MAF because I pulled the connector out and the car still ran. Am I gonna have to get a new one or would cleaning it help? Also earlier today out of nowhere I got a really fast ticking noise coming from the motor and was pretty loud. Could this be the lifters?

 

[Mello]

FWIW I can unplug my MAF sensor & my car keeps running too, but you can tell my engine noticed because the rpms dropped some till I plugged it back in.

 

[pauleyman]

Okay do I've been doing some searching. I actually didn't got with the NGK plugs and wires because they were out of stock at the time but what I did fimd is that I think I have a bad MAF because I pulled the connector out and the car still ran. Am I gonna have to get a new one or would cleaning it help? Also earlier today out of nowhere I got a really fast ticking noise coming from the motor and was pretty loud. Could this be the lifters?

That is not an indicator of a bad maf.

 

[David Boyd]

Its got to be something with my fuel/air because my car is running extremely rich

 

[boostdawd]

The exhaust crack will have an effect in your fuel trims. The O2 sensor will not be getting an accurate reading if the crack is big enough. For moderate boost get ngk bpr6es plugs and gap them to .028. Also do a boost leak test on your car. Might not hurt if u pull the ecu out as well and inspect it for corrosion or leaking capacitors.

 

[David Boyd]

Okay guys... Absolutely hate to say this but earlier today the miss got worse and the motor started knocking.I'm almost positive it was a rod knock. I was going down the road and my motor just locked up on me. Now it won't even crank over. So now I have to pull the motor tomorrow and see what kind of damage I've done

 

[David Boyd]

Figured out that I spun a bearing because of my oil leak...replaced oil pan gasket thinking that's where it was coming from but obviously that wasn't what it was . Also its a 95 gst with a 1g 6bolt with a 14b turbo. You guys got any pointers or have-to mods for my build?