:::RHMT::: Real Home Made Turbo
General Category => Hybrid/Tech => Topic started by: hotrex on July 09, 2009, 09:33:31 PM
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yesterday car had vtec engaging properly, today i take it down the street and nothing.
i checked the wire going to the solinoid with a multimeter and when the car hit 5500 rpms the wire is showing 14ish volts. so the ecu is recognizing and sending power to the solinoid. i have a jdm solinoid with no pressure sensor so the pinout on the harness is chassis grounded. i pulled the vtec solinoid off and the screen is clear...
anyone ever have a v tec solinoid go bad? when i jump power from the battery to the solinoid i can hear it clicking... im pretty stumped. is there a certain point oil pressure wise where vtec wont engage?
my sunpro gauge was wacky on the dyno and then it just stays below zero. the guage works but the sending unit took a shit so i tried installing my new autometer one tonight and my fuckin tunertoys block fitting snapped off in the block... so i wont have an easy out and a new fitting till tomorrow... im starting to get a bit frustrated
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I have had it stop when I was really low on oil... :-[
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im starting to get a bit frustrated
at least it hasn't cought fire yet
check oil pressure, that would seem like the number one cause. sounds simple but was possibly the car cold and you didn't have the temp check disabled?
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no it was up to temp. ill check the oil presure tomorrow. i hope to fucking god thats not the problem.
the pressure sensor is disabled though so vtec sould engage no matter what. whas the lowest pressure the shit will engage on? doesnt seem right though.. the motor runs awesome.
if i hear the solinoid clicking i assume its opening though....
once i get this squared away ill toss my new 1200s in it and wax the dyno...
made 320 in 14.6 psi letting off at 6k. setup should make good power once i get the kinks worked out.
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vehicle speed sensor working?
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plugged oil passage would do it but you better get a gauge on that bitch first!
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did you have anything tap into the v-tec signal wire of your ecu?
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I've had an ecu go bad on me before. The ecu was fine, no codes or anything. It just didn't engage vtec for some odd reason. It was a converted p75. I swapped in a new ecu and it worked just fine. Try a new ecu?
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VTEC stopped working when Joesph swallowed a load.
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From my understanding VTAC won't work without a properly functioning oil pressure switch. Fix that shit then go from there.
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From my understanding VTAC won't work without a properly functioning oil pressure switch. Fix that shit then go from there.
JD choked and didn't swallow????
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From my understanding VTAC won't work without a properly functioning oil pressure switch. Fix that shit then go from there.
Obd2 jdm motors dont come with pressure switches
You can disable it very easily. I have the pinouts somewhere written down.
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From my understanding VTAC won't work without a properly functioning oil pressure switch. Fix that shit then go from there.
Obd2 jdm motors dont come with pressure switches
You can disable it very easily. I have the pinouts somewhere written down.
My mistake
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switch is disabled and i tried a known good p28. my ecu is sending power to the solinoid when its supposed to. vtec just doesnt activizzle.
highrolller. which passage are u talking about here?
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replace the solenoid & check wiring.. can't think of anything else aside from the tune/ecu, but you said you checked that already. Did you swap a good ECU/chip or just different ecu with the same chip?
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My vote is low oil psi. :-X Make sure its ok b4 you go ripping on it. The last thing you need is the Subaru death rattle....
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I agree on the oil pressure check
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My vote is low oil psi.
x76
happened to me too.
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yesterday car had vtec engaging properly, today i take it down the street and nothing.
Yeah, but you had the same problem a week or two ago. It's been an ongoing concern for some time now.
And, to answer the only question worth a shit that you've asked, 50-55 psi. But as shit slops out over 20 years and 200K miles you can bet your biscuit that some heads want more.
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is it throwing a code?
also, just because your gauge says your up to temp doesnt mean the ecu sees good engine temp(seperate sensor) try checking power on the engine temp sensor(2 wire not the 1 plug on thingy) also see if there is a good ground.
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He's logging all that through Clone or S-fecesmanager, pretty sure he knows it's up tp temp.
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since when did volvos come with vtac yo?
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highrolller. which passage are u talking about here?
the one that goes to the vetak3 soliniod, is there shit on the screen?
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yea
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is there shit on the screen?
yea
bearing material? :?:
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So that's where that pesky oil pressure went off to.
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no not bearing material. looks like a tiny bit of alum shavings, prob from when i tapped and plugged the oil passage foe the lsvtec. i sprayed it but some might have been stuck in there.
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Take apart the vtec solenoid. Purple power/powerwash that bitch. Buy a new a gasket/screen for the vtech solenoid Honda should have them in stock since they are supposed to be replaced
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Last week I had a car that the vtec wouldnt work and it was the first time ive ever seen a bad solenoid, replaced the solenoid and it worked :o
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wire the vtec solenoid directly to 12 volt for mad vtec action at idle
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tried that didnt work
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So that's where that pesky oil pressure went off to.
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Another build another fail attempt :evil:
Did you check the oil pressure yet?
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Another build another fail attempt :evil:
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didnt check yet.
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nothing has failed. bum injects and a few little bugs, no big deal.
car will be fine.
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Check the pressure and close this thread. A fucken guage is 10 bucks...
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If the solenoid gets voltage, you can hear/feel it click then its all working. The only component left that assists the crossover is oil pressure. Maybe you should stop driving the car till you get a gauge on it. i can assume you checked the level of the oil already.
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nothing has failed. bum injects and a few little bugs, no big deal.
car will be fine.
Not yet, but the thing you should have check you have not.
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How beat up was your oil pan/pickup?
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i havent been driving it... its been sitting. just installed my new gauge today. 90 psi on startup, 45 psi when its warm idling.
minty minty. its gotta be something dumb. ill figure it out after work tomorrow.
ima take the solinoid off and douche it tomorrow and also douche the oil passages in the head. i have a different vtec solinoid i can try also.
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the oil pan and pickup are in good shape. no dents on the pan and the pickup was also in good shape. im going to drop the pan and check the pickup screen and shit now because im curious. motor pulls good vac and has good oil pressure.
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If you're lucky the head's just a stripped out piece of shit.
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whatr u talking about. the head has like 200 miles on a machine shop freshening.
what are u talking about being stripped
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whatr u talking about. the head has like 200,000 miles on it before a machine shop freshening which doesn't add metal back in anywhere.
what are u talking about being stripped
Gee, I dunno. Despite my familiar posturing I've never experienced VTEC not working even though the control system does and oil pressure's good.
Just ignore me.
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im asking you what part of the head would be stripped.
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The part that engages VTEC. Are you firing on all cylinders?
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motor runs good just wont engage vtec how would i check the head?
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Mine did this on saturday after rebuilding / reassembling a B16. Just to see what was up I opened up the Vtec solnoid on my Z6 and compared the 2
The plunger on the B16 unit pumped oil fine, but when I compared the 2 I found that on the B16 the little round slug sat flush with the case.
On the D series (working) Unit , it sat slightly above.
Cleaned it with brake clean..worked the plunger and it sat above the case like the other one... bolted it up and it works great.
Screen was clean when I pulled it apart , I even cleaned it with brake clean and air the first time around, but I imagine some particles were in there from when the OG motor blew a bearing.
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi31.photobucket.com%2Falbums%2Fc379%2FJmccreery%2Fvtec_solenoid_3.jpg&hash=4c4dafc6631c4e61429231203fb7c87e210b2ebf)
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mint. good look. finally a useful piece of info