speedfreak4996

Alright ive havent been on in a while, but this ve is driving me up a wall..

I got a 93 ve5 and i take it out every night to get some miles on it and to keep it going. Ill start it .. drive about 20 miles with it.. and its got plenty of pep. Ill come to a stop light or even sometimes sustain 65 on the highway for a while and itll just turn into a gutless brick. Just as if someone flicked a switch and said nope no more power.

Ive changed alot of the tune up items, coil packs are all tapped up, new MAF.. what could it possibly be? Its gettin no better than 11-15 mpg. I dont want to get ride of the thing, but i just cant deal with this thing.. prob after prob..

ghostmax

iTrader: (4)

oxygen sensor
knock sensor

Does it idle okay?

speedfreak4996

Yeah man its idling pretty smoothly , sometimes it pops a little out of the muffler at idle.. idle fluctuates from time to time as well

im thinkin the knock sensor.. but id like to really know its that before i dump all sorts of cash into it

Josh

iTrader: (5)

Sounds like a knock sensor, pull out a multimeter and see what its reading is.

speedfreak4996

thanks for the replies.. got my hands into it today and it looks like the previous owners grounded my VTC's.. so i ungrounded them and they dont make anynoise. Could this have been a cause to the prob?

I noticed a pretty steep lose in the low end which is also leading me to believe its a knock sensor.

i just never thought that grounded the vtc would make the ve run like such poop?

Greeny

iTrader: (43)

Grounding the vtc's will not make it lose low end power,it will lose some top end ponies though,not much though...

if you want to diagnose the k/s without removal/replacement,try bypassing the ks with a 470k resistor for a few days..

speedfreak4996

where is the harness for this beast.. everyone talks about the resistor trick but ive heard its risky with detonation.


got a pic of where to put that bad boy?

Jon94SE

I just put my VTC's on a switch recently, if they're making too much noise for my liking and I'm not planning on running it hard I'll just flip them off or on. and I did the same with the resistors. Just find the pins on the ECU and put the switches there to save your self time and hassle but be carefull when messing around down there. And good God that flash makes the engine look dirty

Greeny

iTrader: (43)

This is where the plug is located off the main harness,keep in mind this will be plugged in to another harness on your car,with the other end going under the intake plenum....you need to put the resistor in the plug that goes to the main harness,not the plug going under the intake...

I have had my k/s bypassed for about 105,000 miles now,i use PREMIUM FUEL ONLY!!!If you do this bypass long term,you must use absolutely nothing but premium fuel...

Greeny

iTrader: (43)

Why are you running 2 resistors???

This bypass only calls for 1 resistor...

Jon94SE

hmmm, good question, my friend that told me about it went with me to buy them and said to get those and put two in there...it seems to work fine though.

Greeny

iTrader: (43)

Too "fool" the ecu the correct resistance is 470k,by putting 2 in there you increased the resistnce to 940k..

internetautomar

iTrader: (30)

I thought doubling resistors lowers the resistance
eh, I'm to sick to think straight

Greeny

iTrader: (43)

Dunno?

I thought is was like a double scoop of ice cream..

Gunther

It depends on how they're wired I believe

I think parallel would halve it and series would double it

internetautomar

iTrader: (30)

sounds right to me

CapedCadaver

iTrader: (8)

I've got a Computer Engineering major for a friend... he could anwer all your questions. But he's not online. arg.

ghostmax

iTrader: (4)

In series, resistances add. So Total R= r1 + r2 + .....

In parallel, resistance as follows: 1/Total R = 1/r1 + 1/r2 + .......

Jon94SE

Yeah I asked my friend why two and he said if they're in parallel it cuts it in half.

Greeny

iTrader: (43)

Well,i would like to clear this up...Is 1 470k resistor correct or do we need 2???

How did your friend come to this conclusion?

Aaron92SE

iTrader: (128)

You need only one 470K resistor for the KS bypass on the VE.

If you connect two resistors in series, then it's doubled resistance. If it's in parallel like in that picture above, then it will be half resistance exactly. So hopefully, he stuck two 1M resistors in there and not two 470K resistors.

Jon94SE

I believe it was two 1m's.

Aaron92SE

iTrader: (128)

Then you should be fine.

Jon94SE

Yeah, It's been working the way it should. What would happen if you had double the resistance in there? How would the computer react to that, that would cause problems?

505max94se

iTrader: (15)

I put two 1m ohm resistors (parallel) in Jon's Maxima. I bought them from Radio Shack and this was the only option that I had to get to 500k ohms. It works just fine...

Aaron92SE

iTrader: (128)

Yeah, it will work just fine. Or you could use a 470K resistor if they had that in stock.

505max94se

iTrader: (15)

Yeah, they didn't have any in stock at that particular time.

Greeny

iTrader: (43)

All cleared up...Thanks Aaron/505...

Aaron92SE

iTrader: (128)

Oh, but to get back on topic, it sounds like you are running rich! Which will be a bad o2 sensor in many occasions. If you have never replaced that before, then definitely do that. That's something that needed to be done anyway.

After you know it's not the o2 sensor, then you can try the KS bypass just to test it. If the problem doesn't go away, plug the KS back in and try something else.

Do a tune up... plugs, check timing, fuel filter, air filter, etc.

Also, if none of those things fix it, then you need to look further into the o2 sensor. Get a FSM and do some testing. I bet you are running insanely rich, which can cause a pop to come from your muffler. It's possible you have a bad signal wire or a bad connection somewhere in the o2 sensor circuit. That would put you in the safety fuel map, which is insanely rich. I've been there! Just an idea. Good luck!

speedfreak4996

guys thanks for all the great information. Im gonna try the 470k deal and see where that lands me. I was planning on doing a ypipe soon so a o2 sensor would be put in then.

Im still leary about using the resistor trick. I always use 91 octance fuel but i fear detonation lol.

the car has been tuned up very recently. I actually pulled the front 3 plugs and found that they smelt burnt. Not wet in gas..


something is screwy..

again thanks for the input

Aaron92SE

iTrader: (128)

Well, like I said. Do a tuneup before trying to diagnose ANYTHING. Do it before you try any resistors. Check ignition timing too since I bet it's never been checked.

If you've never replaced your o2 sensor, then that should DEFINITELY be included in your tuneup!

If those things don't work, then you can check the KS. As for the KS, I would check your timing before bypassing it! Then, carefully listen for detonation when you are driving. If you dont know what detonation sounds like, you need to know BEFORE doing the KS bypass! You will blow your motor if detonation is ignored. It's possible to detonate and blow your motor all within 2 seconds if it's bad enough. So be careful.

speedfreak4996

thanks, another stupid question...


how does one check the timing on the ve.. its got chains and all.. i thought it was a system that didnt have to be touched?


what about the indication that there is no gas on the plugs.. could that indicate a lack of spark? I had a serious hesitation before i ungrounded my VTC's.. now its great.. just low power on the low end and that heat sluggishness

internetautomar

iTrader: (30)

you still check it with a timing light.

Black92GXE

iTrader: (3)

glad i have a VG.....