93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
#1
Honda-Tech Member
Thread Starter
93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
Alright I been having this problem ever since I got the car, after driving usually in a warmer temp, upon restart the car will idle at 1500 then just die. I replaced dizzy cap and rotor, spark plugs are 1k miles new, spark wires are new. Fuel filter has even recently been replaced. Timing is at spec also.
#2
re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
And this car is one of those bike cars with an old indian motorcycle motor in it?
#3
Honda-Tech Member
#6
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
Also there is no cel. I've cleaned out the IACV and cleaned and set the fitv to spec.
Trending Topics
#8
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
Yes I just got one the other day for IACV cleaned it out and reset ecu and it went away. The cel comes on with the key in the (ll) position. If I try to cycle the key 30 times listening for the fuel pump it will prime only 23 times. Does this coincide with a main relay issue?
#10
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
No, but this did happen before upon a start up. What does that mean please?
#11
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
On the OBD1 D15B7 the start up idle idle is controlled by the Fast Idle Thermo Valve. It hold the rpm at 1500 until the engine starts to warm up and drops as the coolant heats up. It's 100% mechanical so is not connected to the wire harness.
It may not be related to your issue but it's something you may want to keep in mind if Ron's direction doesn't pan out.
It may not be related to your issue but it's something you may want to keep in mind if Ron's direction doesn't pan out.
#12
#13
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
The cel comes on and off for 2 seconds when in the (ll) position like normal. But when I'm having these issues, the cel has stayed on when in the (ll) position and no fuel pump prime it only does this intermittently.
#14
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
Could also be cause of stall.
Some obvious possibilities:
-Clean and tighten G101 ground on thermostat housing
-Resolder main relay
-Bad ECU
Some obvious possibilities:
-Clean and tighten G101 ground on thermostat housing
-Resolder main relay
-Bad ECU
#15
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
#16
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
G101 is on the thermostat housing. G3 connects the transmission to the chassis.
For the main relay, just resolder it and go from there.
Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder
You can't really test the ECU directly. There are electrical tests that can be done at the ECU connectors, but first rule in or out the first items two I mentioned.
For the main relay, just resolder it and go from there.
Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder
You can't really test the ECU directly. There are electrical tests that can be done at the ECU connectors, but first rule in or out the first items two I mentioned.
#19
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
The wire is the ground I believe. It's goes into a electrical connecter.
#21
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
On the OBD1 D15B7 the start up idle idle is controlled by the Fast Idle Thermo Valve. It hold the rpm at 1500 until the engine starts to warm up and drops as the coolant heats up. It's 100% mechanical so is not connected to the wire harness.
It may not be related to your issue but it's something you may want to keep in mind if Ron's direction doesn't pan out.
It may not be related to your issue but it's something you may want to keep in mind if Ron's direction doesn't pan out.
Also ron, my alternator I believe is going out. It still gets proper voltage oddly, but it makes a horrible whining sound when you put any load on it. Anytime I turn on the lights it makes even louder. Keep in mind I have jump started this car atleast 4 times, due to leaving the lights on. It sounds like the pitch got worse every since. Could this be my problem?
#24
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
Beyond that, I was leaving you to RonJ's capable hands as he is more knowledgeable than I on diagnostics.
For one thing, I'm not sure the FITV can stall the car if it's acting up. I look at the FITV as an automatic choke. Essentially controlling air to fuel ratio when the engine is cold. But my assumed impression of what the FITV is and does is just that, assumed. I do know it can affect idle and cause idle hunting but that is not the problem you reported. So really I was just tossing the FITV out there for RonJ to either confirm or deny as a possible culprit as it won't cause a CEL like the IACV does or any other wired sensor.
#25
Honda-Tech Member
Thread Starter
Re: 93 civic d15b7 5spd, simple bolt ons - Idles at 1500 then stalls
Is the main relay supposed to be hot when you drive? Took it for a trip and felt on it and it was pretty warm. Does this rule it out as faulty all together?