Some months ago i bought myself a MAzda 323 gtx with a gtr swap (engine,transmission,ecu,maf and some 515cc injectors). I've used alot of time to get it road legal, and now its just one thing left to fix: the emission test.
I've had it on a emission test, and the result was a CO on 7.4. I immediately tought it was the big injectors, so i bought four rx7 460cc high impedance injectors (since im running gtx wiring i can't use gtr injectors).
The problem is that the car is still running way rich. I've checked for fault codes, and it only has one; (35) solenoid valve (pressure regulator control, high temp).
Since my car doesn't have the original fuel pressure regulator, both the solenoid valves are disconnected. This fault code shouldn't do anything with the emissions?
I've checked the temp sensor and the fuel pressure. Nothing wrong.
to check the values myself i connected a wideband in the exhaust. It has a narrowband output, so i connected that one to the car so i can be sure it gets a correct lambda-value.
The weird thing is that its not always running rich. Sometimes under warmup its running lean, before it suddenly starts running rich again. sometimes it also runs on 14.7, but suddenly does a jump in rpm, and then running way rich.
Does anyone has any ideas what can cause this? im starting to get out of ideas..
I've had it on a emission test, and the result was a CO on 7.4. I immediately tought it was the big injectors, so i bought four rx7 460cc high impedance injectors (since im running gtx wiring i can't use gtr injectors).
The problem is that the car is still running way rich. I've checked for fault codes, and it only has one; (35) solenoid valve (pressure regulator control, high temp).
Since my car doesn't have the original fuel pressure regulator, both the solenoid valves are disconnected. This fault code shouldn't do anything with the emissions?
I've checked the temp sensor and the fuel pressure. Nothing wrong.
to check the values myself i connected a wideband in the exhaust. It has a narrowband output, so i connected that one to the car so i can be sure it gets a correct lambda-value.
The weird thing is that its not always running rich. Sometimes under warmup its running lean, before it suddenly starts running rich again. sometimes it also runs on 14.7, but suddenly does a jump in rpm, and then running way rich.
Does anyone has any ideas what can cause this? im starting to get out of ideas..
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