is it my timing?

[drzsnapj]

2 issues i need some advice in:

1. i have read many post here about normal idling on the sr20det and they all say 850rpm's is normal, but my issue is that my car idles normaly at 1100rpm's. ocasionally it drops down to 900rpm's but when get to that range the car shakes a little as if it wants to shut off. could this be an issue with my timing?

2. another thing is that when i am in any gear and im slowing down, at around 3000rpm's to about 2300rpm's the car backfires. is that normal or is that a vacuum leak?

[bruinbear714]

2 issues i need some advice in:

1. i have read many post here about normal idling on the sr20det and they all say 850rpm's is normal, but my issue is that my car idles normaly at 1100rpm's. ocasionally it drops down to 900rpm's but when get to that range the car shakes a little as if it wants to shut off. could this be an issue with my timing?

2. another thing is that when i am in any gear and im slowing down, at around 3000rpm's to about 2300rpm's the car backfires. is that normal or is that a vacuum leak?

Both problems seem related to a bad coolant temp sensor, oxygen sensor, or both, or ...?

Seems like something is causing your car to run rich.

[Koshin]

Both problems seem related to a bad coolant temp sensor, oxygen sensor, or both, or ...?

Seems like something is causing your car to run rich.

I have similar issues at times....my car likes to backfire when i am decellarating at about 1500 rpm's...big backfire...I also thought it was timing related. I run no thermostat....could that have something to do with it as well?? my car starts and idles like a stocker but the backfiring thing bothers me.

Rich

[snake240]

def get a meter and test all sensors. fsm explains it all. it will help greatly.

[drzsnapj]

where can i get FSM for an SR in english? or dose anyone know the specs for those sensors, the range the voltage has to be?

[bruinbear714]

I have similar issues at times....my car likes to backfire when i am decellarating at about 1500 rpm's...big backfire...I also thought it was timing related. I run no thermostat....could that have something to do with it as well?? my car starts and idles like a stocker but the backfiring thing bothers me.

Rich

If you run no thermostat your gas mileage is probably shot to hell. Running your engine as cold as possible is a bad idea. The ECU will always enrich fuel since it'll think the engine is still "cold".

[boro drift]

You have a vacuum leak. What intercooler are you running?

[snake240]

for the fsm, look in the stickys at top of sr section of forum. also use the search for this site. if those dont work just google for s14. most of everything is the same. its easier to find as well. there is no book that you can buy. i found mine on google a while back. make sure you have adobe.

[TRBOMOFO]

I have similar issues at times....my car likes to backfire when i am decellarating at about 1500 rpm's...big backfire...I also thought it was timing related. I run no thermostat....could that have something to do with it as well?? my car starts and idles like a stocker but the backfiring thing bothers me.

Rich

i had this problem and it was due to me running to rich

and also i dont recirc my BOV so when you come to a shift or stop you are missing some extra air that comes from the BOV which helps the A/Fs

get a air/fuel meter and get a tune