sohc 89240sx BPT valve code 32 help!!!
sohc 89240sx BPT valve code 32 help!!!
ok so here is the deal, i have a check engine code 32, i took off the vacume hose to the egr valve to see if there was vacum and there is none, so i pulled the bpt valve and checked the hose under it( it does like a T) and there was on that, but none on eaither side of the bpt valve, so i took a vacum t thing and just took out the bpt valve, and cleared the code and well the damn thing came back, but what is weird is that after i clear the code i start the engine up and when i put my foot on the gas the light will come on and as soon as i release it it goes off, then after i turn it off and back on it just stays on the whole time, this happened with the bpt valve on and with it off and just t-ing all the lines toghether, does anyone know what to do?
Re: sohc 89240sx BPT valve code 32 help!!!
godspeed wrote:ok so here is the deal, i have a check engine code 32, i took off the vacume hose to the egr valve to see if there was vacum and there is none, so i pulled the bpt valve and checked the hose under it( it does like a T) and there was on that, but none on eaither side of the bpt valve, so i took a vacum t thing and just took out the bpt valve, and cleared the code and well the damn thing came back, but what is weird is that after i clear the code i start the engine up and when i put my foot on the gas the light will come on and as soon as i release it it goes off, then after i turn it off and back on it just stays on the whole time, this happened with the bpt valve on and with it off and just t-ing all the lines toghether, does anyone know what to do?
The vacuum hose from the BPT to the EGR isn't supposed to have vacuum at idle. When the BPT has enough backpressure (hence backpressure transducer valve) then it will allow vacuum to the EGR diaphram. If you rev the engine to around 2500 you should feel vacuum then.
Removing the BPT valve is not a good idea at all in your case, you will do nothing but make the code stay there permanently, without the BPT the EGR will never work. You'll never pass inspection in california (if it's as strict as i hear).
The problem could just be that your bpt isn't working properly, i'm assuming this is a new problem and never happened before. put things back they way they were and get a bpt from a junkyard.
The egr/evap purge solonoid does not supply vac to the bpt till the hard idle switch goes open(just off idle). if you have had high flow exhaust installed it could effect the operation of the bpt since it relies on exhaust back pressure to close the vent in the bpt. your profile says your in japan but i will ask anyhow. does your car meet california emission standards. If so you have a egr temp sensor which detects a rise in egr passage temp. If the rise is not sufficent enough in a certain time frame it will trigger the code 32 you are seeing. at idle test your egr flow by reaching your fingers under the egr and pushing up on the diaphram. if the engine stumbles severly or dies it indicates your have decent flow through the passage. you then need to determine if the temp sensor is reading the appropriate voltage. To test the egr temp sensor back probe the 2 wire connector going to the sensor. the voltage should sit some where between 2.5 to 4 volts. No matter what it reads in that range when you lift up on the egr diaphram ,with the car off idle around 2000 rpm is good, you should see a significant voltage drop on the sensor if held for a good length of time it should drop to nearly 0v. If this simple test turns out ok then you wanna chase your vaccum/ back pressure problem.