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Car Trouble.


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#1 Urbanoutlaw

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Posted 27 June 2007 - 11:10 PM

So rather than take over Sky's topic on transmission trouble, I decided to start a general car trouble topic here.

I can't promise to fix your car over the internet, but will try to at least point you in the right direction to get back on the
road.

Let's motor!

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#2 MrLlamaLlama

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Posted 27 June 2007 - 11:54 PM

Since i don't own a car, i own a motorbike, i have no place here... :(
But everything is mechanically sound here.. Just one thing though
Would there be any reason for major fuel consuption, like a fifth of a tank more than usual? My riding habits haven't changed, if anyhting, i'm going slower since my crash... but hmmmm. Doesn't look like a leak...
Oh, and my speedo rattles!

ONE MORE QUESTION:

How is a fuel light engaged in a car, is a float within the tank, or what? Mine doesn't seem to be working.. i've tried the usual, lean the bike right over both ways, and zip, zilch, zero. No light, no nuthin. So i switched the neutral light and fuel light to see if the bulb worked. It did. Help! ( if you can)

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#3 Urbanoutlaw

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Posted 28 June 2007 - 12:07 AM

Same things make bikes run as cars, so they're fair game.

Question 1 - How's the sparkplug look? Same for the air filter. Either of these would fubar your mileage.

Are you smelling gas while you ride? Look for a leak. This could also be from a stuck float if you have a carburetor.
If it's new enough to have fuel injection, you might have to put it into a shop.

Question 2 - The fuel light should be triggered by the float that also serves your gas gauge. If it's not working, check the
wiring to the sending unit first. If still no luck, drain the tank into a gas can & pull the sending unit, the float may have gone
bad.

Let me know what kind of car (or bike) you're working on, everybody builds them a little different.

If anyone reading this topic recognizes a problem, feel free to speak-up.

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#4 MrLlamaLlama

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Posted 28 June 2007 - 12:20 AM

Same things make bikes run as cars, so they're fair game.

Question 1 - How's the sparkplug look? Same for the air filter. Either of these would fubar your mileage.

Are you smelling gas while you ride? Look for a leak. This could also be from a stuck float if you have a carburetor.
If it's new enough to have fuel injection, you might have to put it into a shop.

Question 2 - The fuel light should be triggered by the float that also serves your gas gauge. If it's not working, check the
wiring to the sending unit first. If still no luck, drain the tank into a gas can & pull the sending unit, the float may have gone
bad.

Let me know what kind of car (or bike) you're working on, everybody builds them a little different.

If anyone reading this topic recognizes a problem, feel free to speak-up.


Ahh, the sparkplug, get through them like christ knows what on a 2 - stroke (lol)
Just rplaced the filter last week, so it shouldn't be that... :mellow:
No smell of 'gas' while riding, and it's not fuel injected, i think :huh:

And err, i don't have a gas guage... It's a spanish import pit / racing style bike, and they don't build 'em with fuel guages....

I chacked all the wiring upon purchase of the bike, like the temp guage, neutral light, high/low beam/ signals.... and all that jazz, seemed to work fine. Is there any way i can check to see if the light will come on? Like when i wanted to check if my temp guage worked (i thought it was faulty, my engine temp always seemed to low t be true, then i remembered i was water cooled B) hehe so i grounded (or somethin) some wire or another (under instruction of my father, and the temp needle shot right up. Any similar procedures with this?
Plenty of time over the next few days, if all else fails i'll drain it out and have a looksee.

As for my bike, i ride a 50cc Motorhispania RX 50 Super-racing, year 04, liquid cooled, 2 stroke engine. All i'm legally allowed :(
Gets me around, looks the mutt's nuts for a 50cc, and it'll do about 60 if i'm down a hill... lol
(see the post pics of ur cars thread- pics in there)

QUESTION 2: is it absolutley vital to top up my battery with distilled water? What will happen if i dont?

Thanks for all the advice B) !!!!!!

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#5 Urbanoutlaw

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Posted 28 June 2007 - 12:28 AM

I presume the sending unit is mounted on the bottom of the tank. Drain the tank & pull the sending unit, (leave the wiring connected) then you'll probably need a ground wire from it to a bare spot on the engine (A cooling fin on the cylinder works
great). Manually move the float & see what happens.

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#6 MrLlamaLlama

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Posted 28 June 2007 - 12:33 AM

Will do cap'n!
But it's 1:30 am here, and i don't wanna wake everyone uo right now, maybe in the morning....
thanks again for all your help!

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#7 Righty

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Posted 28 June 2007 - 01:54 AM

Why does my car backfire everytime it starts?

It's either a leaky injector or a timing problem.

#8 Urbanoutlaw

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Posted 28 June 2007 - 02:01 AM

Could be the gas, wear in the timing set......long list. :bashhead:

Lets start w/ year, make, model, mileage, etc.

If it's your Taurus, I think you've recently blown out the cobs.....

If it's been awhile since a tune up, that will probably help.

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#9 Righty

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Posted 28 June 2007 - 02:32 AM

Actually just did about all that can be done for a tuneup. But the spark timing is a little early and when I turn the car off it doesn't hold any fuel pressure. So I turn the car off and all of the fuel in the line sprays into the intake manifold. The spark plug fires before it is supposed to and burns the fuel before it is supposed to.

I think it's kinda cool though. Especially if I get it at the right time, it's pretty audible.

#10 draftermatt

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Posted 28 June 2007 - 12:08 PM

Why not. If you can solve this, I'd love you forever. (My dad and I, and the local Jeep dealership, and the Jeep Forums don't have a clue).

I have a 96 Jeep Grand Cherokee (4.0 I6, AT) It hesitates sometimes. You will hit the gas and it will go, but not above 25 MPH. It sounds like it's missing sometimes, but not always. Now, we replaced the transmission filter, no debris. We put new plugs, wires, O2 sensor, exhaust (cat & muffler) and the Power Train Control Module (PCM) has been reset twice.

We found a TSB from Chrysler on an issue like mine that requested the PCM be reset. So I took it to the dealer and had it done. Then there was a recall on it, so I had it done again. I got a little better after the first one. After the 2nd it was about the same as original. Then it didn't do it very much, now it's doing it a lot again.
I'm older than most of you. Shut the hell up and get off my lawn.

#11 Righty

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Posted 28 June 2007 - 06:44 PM

Does it have an electronically controlled throttle? Might not be opening the throttle or opening it too much. What about a MAP sensor? Might not know how much air it has and can't get the air/fuel ratio right.

#12 Urbanoutlaw

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Posted 29 June 2007 - 02:55 AM

Do either of you guys have a "CHECK ENGINE" light on?

Righty - Sounds like worn injectors. What year is your car? (the Taurus, right?) A bad MAP sensor would throw things off a
little, but I don't think it would cause the injectors to leak into the manifold. Save your money on that for now. If the rest of
the car is in decent shape, spend an hour's labor in a shop & have them check it out. It's probably something simple.

draftermatt - Clarification, are you saying it won't go over 25 MPH, or is just gutless over 25? It sounds like a bad computer,
but without actually seeing it first hand I can't be sure. I had an older Volare that drove the previous owner nuts w/ similar
problems that turned out to be a bad magnetic pickup in the distributor. If your Jeep is a '96, it should be OBD II. Do you
remember what the trouble codes it showed?

BTW How is the fuel pump? I've seen this sometimes when they start to go bad.

Both of you - A local parts store might be able to check the codes for you at no cost.

Edited by Urbanoutlaw, 29 June 2007 - 02:56 AM.

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#13 draftermatt

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Posted 29 June 2007 - 11:22 AM

My check engine light isn't on, and my Dad has an ODB2 checker to check the codes.

We thought about the MAP sensor, but when I called the parts store to get one they claimed my truck didn't come with one. Thought about the fuel pump, but I don't remember why we decided not to go that route.

The problem is that it won't go over 25. It kind of bucks and won't go faster, then it will start to go. After that it runs fine.
I'm older than most of you. Shut the hell up and get off my lawn.

#14 Urbanoutlaw

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Posted 29 June 2007 - 05:28 PM

Sorry for the confusion, the MAP sensor was for Righty.

So it hits 25, kinda stalls for few seconds & picks up speed from there.

If you have a Jeep or 4x4 club in your area, see if they can recommend an honest shop that can troubleshoot OBD II.

My best guess is the computer is damaged, so you have to keep re-setting it.

I presume it's stock.

Did a quick search on recalls for you, found something about the wiring to the PCM, don't know how much help it is.

http://home.sc.rr.com/janet/
http://home.sc.rr.co...SB/08-01-97.htm

Edited by Urbanoutlaw, 29 June 2007 - 05:37 PM.

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If not, point & laugh when it flies into a woodchipper.


#15 Righty

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Posted 29 June 2007 - 07:11 PM

My MAP was directed at drafter. Our 2001 Wrangler that we had had a MAP sensor go out (along with a million other things, that was a lemon fo sho).

I don't think the Taurus uses MAP.

I really do think my problem is a bad injector though. I smell raw gas on starts too. And it's an 01 with 49100 miles.

I would like to add that I'm just wondering what it is for piece of mind. The car runs good and I get great gas mileage. So I can't complain about it really.

#16 Urbanoutlaw

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Posted 01 July 2007 - 07:55 PM

MAP is Manifold Absolute pressure. It's a small box (between a Zippo & a pac of cigarettes in size) on the firewall (of my
old '87).

http://www.kemparts....alk/145-205.gif

It tells the computer how much vacuum (or pressure on a turbo or SC) is inside the intake manifold. Should have a single vacuum line & a couple of wires.

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If not, point & laugh when it flies into a woodchipper.


#17 Righty

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Posted 01 July 2007 - 10:36 PM

I didn't think I had a MAP sensor. I thought it used only the MAF to figure out how much fuel to put in.

Apparently I do.

But I remember when the MAP sensor went bad on our 01 wrangler (same engine as the 4.0 Grand Cherokee) it did similar things.

#18 Urbanoutlaw

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Posted 02 July 2007 - 04:00 AM

MAF (Mass Air Flow) is the one you may or may not have, depending on the type of FI you have. The MAF tells the computer how exactly much air is coming into the intake, so the fuel mix is more accurate. Older Fords (like an '86 Tempo) didn't use
them.

It'll look similar to this -

http://www.fordscorp...mages/mafp1.jpg

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If not, point & laugh when it flies into a woodchipper.





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