My svo died last night need help

rix_five0 · 07-14-2009

Im so freakin upset!!!! On saturday night one of my friends took my car for a test drive, it was fine beforethen. It turned off on him twice because of his drivin skills, we got back and parked it. When it was time for me to leave i turned it on an all of a sudden the idle droped so low it almost turned off and jumped to about 800rpm and droped again. The motor would shake and turn off sometimes because the idle would drop too low and just did this ever since. I parked it all day sunday and decided to drive it monday evening, as i was headed back home i noticed that when i was cruising it felt as if it wanted to cut off, i would give it some gas and it would be fine. About less than half a mile from my house i caught a red light and it died on me, i cranked it and nothing. My guess, im hoping, is that is just a sensor of some kind or that freakin TFI module. Can any one please help.

SM90Stanger · 07-14-2009

First of all, NEVER let a friend (who can't drive) drive a rare and expensive car such as yours.

As far as the problem, it could be a dead battery because it sounds like the engine just isn't getting a spark and then you can't even start it after.
First, get the battery tested. If the battery is fine, it's the alternator. You can go get that tested as well. Also check to make sure your air filter isn't clogged. Just go over all of the basics: battery, spark plugs and wires etc. Beyond that, I can't really help. Sorry and good luck

!

TOM RENZO · 07-14-2009

Check for spark and fuel. Is the cam turning? If not timing belt could have jumped or broke. If not run codes and repost

TOM RENZO · 07-14-2009

Check for spark and fuel. Does the cam turn when you crank it? Does the DIZZY turn when cranking. Timing belt could have jumped or the dizzy gear could have lost teeth. If not run codes and repost

FrankBullitt05 · 07-15-2009

try a leakdown test as well, may be a broken headgasket or some such...

I had the headgasket deteriorate on my car between the 1 and 2 cylinders and have very similar symptoms as you described. No compression for those two cylinders, and thus no power.

rix_five0 · 07-15-2009

Quote:

Originally Posted by TOM RENZO

Check for spark and fuel. Does the cam turn when you crank it? Does the DIZZY turn when cranking. Timing belt could have jumped or the dizzy gear could have lost teeth. If not run codes and repost

Theres both spark and fuel and for the timing belt it seems to be fine unless it jumped but the friend who drove it punched it only once and didnt rev it over 4500 rpm and was fine when we parked it 'till a couple of hours later.

rix_five0 · 07-15-2009

Quote:

Originally Posted by FrankBullitt05

try a leakdown test as well, may be a broken headgasket or some such...

I had the headgasket deteriorate on my car between the 1 and 2 cylinders and have very similar symptoms as you described. No compression for those two cylinders, and thus no power.

Thanks for the pointers but when you have a busted head gasket the motor usually smokes and mixes water with oil and my car has none of those, thank god, well it smokes at start up a little but im pretty sure thats just old valve seals. I'll still check compression later cause i havent done it.

TOM RENZO · 07-15-2009

Check fuel preasure. And run codes. you can do a quick check to see if timing jumped by removing the plug on the front cover and look to see if the timing marks are lined up. Crank to cam. Then check the ignition timing. How old is the TB. It may have jumped.

IXXBC · 07-16-2009

Could it be your intake at the impellor of your turbo? When the turbo doesn't get sufficient air it bogs and dies.

NavySVO · 07-16-2009

test the TFI using this

rix_five0 · 07-16-2009

i was just about to ask how to test some of these sensors or modules, thanks so much.

rix_five0 · 07-16-2009

im sure the TB is as old as the car is but i could not get that damn plug off its so stiff i didnt want to tear it. As soon as i get off from work ill take the whole cover off. If it where that the TB jumped wouldnt the motors malfuction be constant?
because my cars malfuction would go away sometimes, it started malfuctioning little by little. I still have a gut feelin it might be the MAP,TFI, or the TPS. I noticed once that when i had the car at idle, before all this happened, i would hold the throtle to hold the rpms like at 1500 and it would bog and idle would drop low and motor would shake just alittle not so bad as before it died. The idle would get back to normal after a few seconds but this would happen only at that certain rpm.

NavySVO · 07-17-2009

Quote:

Originally Posted by rix_five0

im sure the TB is as old as the car is but i could not get that damn plug off its so stiff i didnt want to tear it. As soon as i get off from work ill take the whole cover off. If it where that the TB jumped wouldnt the motors malfuction be constant?

Are you talking about the TPS plug? It isn't on the throttle boby per say, just the wiper portion of the TPS is held onto it by 2 screws. Follow the wires out to get to the plug.

Quote:

Originally Posted by rix_five0

I still have a gut feelin it might be the MAP,TFI, or the TPS.

You don't have a MAP sensor. You do have a BAP (Barometric Air Pressure) sensor that should have the port open to the atmosphere. The reason I mention this is that some people have hooked it up to the vacuum tree thinking someone else disconnected it.

rix_five0 · 07-17-2009

the plug that tom renzo mentioned to me and i later mentioned, im guessing, is the one on the TB cover to check the markings on the timing gear. As for the BAP i didnt get a chance to check it when i found out that( as i suspected) the TFI is bad, i ran some tests according to the document you sent me, thanks alot again

. I took off the old one and noticed it was an aftermarket piece brand name WELLS, so i guess it had gone bad once before. I want to purchase the motorcraft tfi but that thing is expensive, over $140, but i found one MasterPro with lifetime warranty for just $37, i just hope i dont have to change that freakin piece every month.

NavySVO · 07-17-2009

Quote:

Originally Posted by rix_five0

is the one on the TB cover to check the markings on the timing gear. .

Ah...TB = Timing Belt.....I thought you were talking about the Throttle Body

Quote:

Originally Posted by rix_five0

but i found one MasterPro with lifetime warranty for just $37, i just hope i dont have to change that freakin piece every month.

Buy another one so you can change it out to get to the parts store for your new one when it fails again. It is always good to have a spare as well. It will come in handy when you are in the middle of nowhere and break down.