miata wants to die at idle
#1
Junior Member
Thread Starter
Join Date: Sep 2012
Location: grants pass oregon
Posts: 81
Total Cats: -25
miata wants to die at idle
I have been working on this problem for two weeks.
01 miata custom T-25 kit
550cc injectors
It kinda rough on start up then idles fine until I go drive it and temps start to climb.
Then when I come to stop or push in clutch it wants to die. Also hesitates if right when hit gas. And when I fully boost car blows little bit of oil smoke. And my wideband is showing max lean when I punch gas.
Here's a list of what I've already tried
Replaced:
Plug wires
Crank position sensor
Can position sensor
PCV Valve
Spark plugs
I cleaned the MAF sensor
Pulled turbo and intercooler, no oil
Checked all vaccum hoses
Coolant is clear
Oil isn't foamy or muddy
Haven't checked compression yet.
plugs look a little lean but all look the same
Before I tear into engine. I bought gasket set and ARP head studs. A while back so no biggie if I have to do head gasket.
When I took intake manifold off to install turbo feed line I reused the intake manifold gasket.
Think that's causing a vaccum leak now?
01 miata custom T-25 kit
550cc injectors
It kinda rough on start up then idles fine until I go drive it and temps start to climb.
Then when I come to stop or push in clutch it wants to die. Also hesitates if right when hit gas. And when I fully boost car blows little bit of oil smoke. And my wideband is showing max lean when I punch gas.
Here's a list of what I've already tried
Replaced:
Plug wires
Crank position sensor
Can position sensor
PCV Valve
Spark plugs
I cleaned the MAF sensor
Pulled turbo and intercooler, no oil
Checked all vaccum hoses
Coolant is clear
Oil isn't foamy or muddy
Haven't checked compression yet.
plugs look a little lean but all look the same
Before I tear into engine. I bought gasket set and ARP head studs. A while back so no biggie if I have to do head gasket.
When I took intake manifold off to install turbo feed line I reused the intake manifold gasket.
Think that's causing a vaccum leak now?
#3
I have been working on this problem for two weeks.
01 miata custom T-25 kit
550cc injectors
It kinda rough on start up then idles fine until I go drive it and temps start to climb.
Then when I come to stop or push in clutch it wants to die. Also hesitates if right when hit gas. And when I fully boost car blows little bit of oil smoke. And my wideband is showing max lean when I punch gas.
Here's a list of what I've already tried
Replaced:
Plug wires
Crank position sensor
Can position sensor
PCV Valve
Spark plugs
I cleaned the MAF sensor
Pulled turbo and intercooler, no oil
Checked all vaccum hoses
Coolant is clear
Oil isn't foamy or muddy
Haven't checked compression yet.
plugs look a little lean but all look the same
Before I tear into engine. I bought gasket set and ARP head studs. A while back so no biggie if I have to do head gasket.
When I took intake manifold off to install turbo feed line I reused the intake manifold gasket.
Think that's causing a vaccum leak now?
01 miata custom T-25 kit
550cc injectors
It kinda rough on start up then idles fine until I go drive it and temps start to climb.
Then when I come to stop or push in clutch it wants to die. Also hesitates if right when hit gas. And when I fully boost car blows little bit of oil smoke. And my wideband is showing max lean when I punch gas.
Here's a list of what I've already tried
Replaced:
Plug wires
Crank position sensor
Can position sensor
PCV Valve
Spark plugs
I cleaned the MAF sensor
Pulled turbo and intercooler, no oil
Checked all vaccum hoses
Coolant is clear
Oil isn't foamy or muddy
Haven't checked compression yet.
plugs look a little lean but all look the same
Before I tear into engine. I bought gasket set and ARP head studs. A while back so no biggie if I have to do head gasket.
When I took intake manifold off to install turbo feed line I reused the intake manifold gasket.
Think that's causing a vaccum leak now?
#7
Junior Member
Thread Starter
Join Date: Sep 2012
Location: grants pass oregon
Posts: 81
Total Cats: -25
AEM FIC
IACV retained.
It started doing it out of blue one day.
18 psi. Your right I don't want to mask problem. I know i shouldnt have ran car lean to get symptoms through rpm band. But had no choice.
Im pretty sure its not my tuning haven't touched it in a month and was perfectly rich before problem started.
I also cleaned egr valve really well
I re sealed all my piping couplers when I had intercooler out.
IACV retained.
It started doing it out of blue one day.
18 psi. Your right I don't want to mask problem. I know i shouldnt have ran car lean to get symptoms through rpm band. But had no choice.
Im pretty sure its not my tuning haven't touched it in a month and was perfectly rich before problem started.
I also cleaned egr valve really well
I re sealed all my piping couplers when I had intercooler out.
#10
If he adjusts the idle screw, the car won't die at idle. I don't see that being terrible advise given what he appears to be working with. If there's a better way, I'm not aware of it and I haven't seen any other relevant suggestions.
#13
Did you have better advise that didn't involve the word "megasquirt"?
If he adjusts the idle screw, the car won't die at idle. I don't see that being terrible advise given what he appears to be working with. If there's a better way, I'm not aware of it and I haven't seen any other relevant suggestions.
If he adjusts the idle screw, the car won't die at idle. I don't see that being terrible advise given what he appears to be working with. If there's a better way, I'm not aware of it and I haven't seen any other relevant suggestions.