can a bad pressure regulator or bad injector insulators cause excessive gas consumption and or black smoke at idle?
excessive gas consumption
- Thread starter supraman508
- Start date
it happened to me once and it was the fuel pressure regulator vsv, it didn`t let vaccum to the fpr.
I knew it, did u have a hissing sound near your regulator like i do?a_sesshoumaru;1100878 said:
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That is the only place i would have a leaks since i use zip ties and i checked every other place very carefully.This unfortunate misshap started rite after i forgot to plug in my mass air flo do to starting the engine and the fan cut the plug rite off.had to reconnect the five or six wires back together so the e.c.u could read the m.a.f sensor and now she idles by herself when she is cold or hot, strange.Fix one problem and another occurs.i guess this is how the 7mge world operates:cry:a_sesshoumaru;1100902 said:
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Check the vacuum hoses for cracks. Usually a hissing sound is a good indicator of a disconnected/cracked hose.
Edit: Just saw your other post(you really should keep it all in one post...) The code 51 is also TPS(Throttle Position Sensor) idle switch, so you need to check that as well. As far as the 42, I would check the wiring at the connector, and make sure the insulation is intact, and that the wires aren't bared, fraying, or touching each other or grounding on the trans. If that checks out, test the vss via the tsrm, and replace as necessary. I'd pull the sensor out, and make sure the gear on the end is intact, and all the teeth are good as well.
Edit: Just saw your other post(you really should keep it all in one post...) The code 51 is also TPS(Throttle Position Sensor) idle switch, so you need to check that as well. As far as the 42, I would check the wiring at the connector, and make sure the insulation is intact, and that the wires aren't bared, fraying, or touching each other or grounding on the trans. If that checks out, test the vss via the tsrm, and replace as necessary. I'd pull the sensor out, and make sure the gear on the end is intact, and all the teeth are good as well.
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Thanks i'll do that and at the same time i will disconect the wire harnes from the thermostat housing and the oxygen sensor,and distributor and inspect it for damaged wires since the fan cut the m.a.f plug and kinda pulled the harnes some.Before that happened i did'nt burn rich and have black smoke with the excessive gas consuption.cuel;1101379 said:
BlackDynamite
KTHXBIA
Mine ran rich when my knock sensor went out....which a lot of people said it was the wiring, but actually turned out to be the sensor. Though i think it would have a code 52(Am I Right?)...if it was out
Refresh my memory where is the knock sensor located,I don't have my t.s.r.m on me at the time.BlackDynamite;1101530 said:
BlackDynamite
KTHXBIA
This couldn't be the problem, but I'm just stating what happened to me....lol....BUT it's in the most pain in the ass place on the block....Right underneath the intake manifold about midway on side of block.
This a a pick i had of my block, but i had it upside down, so i rotated the pic ;]
The left is the front of the block. Find the second freeze plug from the left and you'll see a screw hole right next to it. If i'm correct that is where it is.
If i remember correctly, if the knock sensor system was not working correctly, it retarded the timing and made the engine run excessively rich and making you excessively poor. ;]
But if there is a hissing and nothing works(like replacing vacuum hoses), try unhooking the vacuum line going to the Fuel Pressure Regulator and run it, with a separate piece of the vacuum line, to a spout somewhere on the throttle body or something where a vacuum is easily accessible. If it works then, your FPR is more than likely fine. If not, then maybe you need to rerun the vacuum lines with Fresh, new line. VSV's are Known for cracking just after shear age also.
This a a pick i had of my block, but i had it upside down, so i rotated the pic ;]
The left is the front of the block. Find the second freeze plug from the left and you'll see a screw hole right next to it. If i'm correct that is where it is.
If i remember correctly, if the knock sensor system was not working correctly, it retarded the timing and made the engine run excessively rich and making you excessively poor. ;]
But if there is a hissing and nothing works(like replacing vacuum hoses), try unhooking the vacuum line going to the Fuel Pressure Regulator and run it, with a separate piece of the vacuum line, to a spout somewhere on the throttle body or something where a vacuum is easily accessible. If it works then, your FPR is more than likely fine. If not, then maybe you need to rerun the vacuum lines with Fresh, new line. VSV's are Known for cracking just after shear age also.
