Another Backfire Issue...

[RB20_ZED]

Okay looked at the various backfiring threads but not much relevant info for this...

When the engine is cold (first start of the day), the car backfires and hesitates on acceleration... happens until temp hits about 1/8th... after that it drives perfectly...

THEN on really hot days such as today, after driving/sitting in traffic for around an hour or so (i.e. underbonnet temps hot) - the car backfires on deceleration... the actual temp needle never goes above half though.

is there some temp sensor thats supposed to change the fuel mixture according to temp??? Or maybe the coil packs? im really stumped.

btw its an RB20det

[RB30-POWER]

coolant temp sensor is what you should be checking out.

[skylinegtts]

ive got the same problem, but never looking into it much, coz it didnt happen under normal temps

[RB20_ZED]

coolant temp sensor is what you should be checking out.

what do u mean??

[MBS206]

The coolant temp sensor that goes to the ECU is different to the temp sensor that sends to dash.

Get a new engine temp sensor for the ECU.

[RB20_ZED]

The coolant temp sensor that goes to the ECU is different to the temp sensor that sends to dash.

Get a new engine temp sensor for the ECU.

excellent thanks!

[skylinegtts]

is it located near the temp sensor that goes to the dash?

how much does one cost?

Cheers

Stephen

[RB30-POWER]

its the two pin sensor alongside the single wire dash sender.

you test it first and compare to specs, don't just replace shit like a dodgy mechanic would do.

you can do a search for the specs i have put them up before, but from memory nissans are around 2k ohm @ 20degC water temp and drop to around 0.3k ohm @ 80degC.

Just check it changes somewhere near these readings with your multimeter and you will know if its faulty or not.

you will need to turn the car off and unplug the connector and measure it with multimeter on ohm/resistance scale obviously.