Ok the check engine lite is on and it's got a nasty shudder about 40K and
up. Although there seems to be an intermittent miss most times. I've
changed the dpfe and that didn't fix it.
I know i may end having to get a scan for codes but i'm in canada and they
want abit much for doing it.
A couple quick questions to start. I have unhooked the fuel pressure vacumm
hose (I wanted the vacuum for the egr for a quick test), should the motor
idle etc change when i do that. It didn't.
And (not really a question) but the idle appears to drop about 100 or so
when i put it in gear. I don't remember that it normally did that but it
might provide a clue to one of you.
I'll be changing the fuel filter shortly (it may not help but it is needed)
and as soon as i can find a fuel pressure guage i will be testing that.
Any suggestions as to what it might be would be great.
Save yourself a lot of unnecessary expense and have the codes scanned....
Your MIL is trying desparately to tell you something and you aren't
listening to it. By the time you're done throwing parts willy-nilly at it,
the correct procedure will look like a bargain.
I'm not sure what you call "a bit much" for auto repair.... with our current
gasoline prices, every day that you put necessary maintenance and repairs
off could be costing a great deal in lost fuel mileage. Add that a motor
vehicle is the biggest single investment many people make, it deserves to be
cared for properly.... lest it become a misguided missle when one of it's
safety systems fails. And we shouldn't forget that much of the country is
exposed to some pretty nasty weather... I couldn't see me puttting myself at
the whims of mother nature in a vehicle that could up and leave me stranded
at 0dark:30 on a lonely stretch of road too far from a cell tower.
Its more likely a spark plug or wire although a fuel filter is a very good
thing to change for preventative maintenance. Has it had a tune-up lately?
If not, I would put plugs in it for sure. If it is missing and the light is
on a code is probably set for the cyl that is dead/weak. Your EGR not
working will not cause a miss. I think your EGR needs backpressure to open
so idling wont do it. Idle dropping a little when put in gear is not a
problem. Bottom line....look at the plugs and wires first, especially if it
is a jerky kind of stuttering miss.
A bit much or not, when the CEL is on the very first step is to read the
There are only a hundred or so things that will set a code and turn on the
You've already wasted about $75 on a DPFE that you didn't need.
No, the idle won't change when you pull the hose off of the fuel pressure
If the engine has a miss, the RPM will drop when you put it in gear. The IAC
make up for the RPM loss from the miss and the transmission load.
Thanks for the rant Jim but it wasn't helpful in this case. I did an ask at
one garage the cost of the scan. $70.95 before tax.
That sounds abit much to me.
Be that as it may I've noticed that I can occasionally smell gas while
driving and the miss is not there if i drive with a heavy foot. So i
suspect it is fuel related. Going to rent a tester for the injectors and
check the resistance of each injector as well.
Anyone else have a suggestion.
The problem is likely not an injector. They do fail occasionally, but very
Why don't you rent a scanner instead of an injector tester. Like I said, when
is on, the first step is to pull the codes. No good way to avoid it.
Let me give you an example. Yesterday, the wife said the CEL was on in the 98
Taurus. One of the very common failures is the DPFE and I suspected that may be
problem. Actually, I was sure that was the problem because it is so common.
codes, sure enough P0440 was set. Purge flow solenoid was stuck open.
No spark at all. I'll do the resistance checks tomorrow and likely go to an
autowrecker to get a replacement. I know one wrecker that won't charge me
an arm and a leg and I can bring along my meter and test it before i buy.
Been so busy I didn't have a chance to update this thread. It was in fact
the coilpack. Got one from a wrecker very cheap. Same coil pack is used on
a 2000 toyota (i think it was). Runs like a charm. Of course now i have
the ABS light on. I'll figure that one out i hope.
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