'94 injectors - this is wierd...

[Brad-Man]

I have an idling/driveability problem w/my ''94 Q45a.

My wife used to drive the car every day (my other car is a '96 Town Car) and when I was working elsewhere, she had the shortest drive, so it was easy to tell her to drive the Q for ~14 miles a day instead of my 25+ - better gas mileage and regular gas being a big incentive at prices what they are.

When she complained about the car missing and not running right, I drove it for 3 weeks with no problems. I was ready to turn it back over to it when it started idling rough and not running worth a crap - the check engine light came on.

I tested the injectors and found 3 either dead or out of spec as far as ohms go. (Two dead one @ 48 ohms).

This was at the connector. When I tested two AT THE INJECTOR (after spraying electrical contact cleaner on the connector and waiting a while), one was 48 ohms and two were DEAD.

This morning, I started the car and the check engine light was off and the car ran perfectly!

I drove it about 20 miles and took it to get emissions tested (I live in metro Atlanta and we have to be tested each year within a month of the owners' birthday) and it passed with no problems.

I am at a loss here...

I know dam@ well that I tested those injectors with a good Digital Multi-Meter and I know that they tested either out of spec or dead. (I actually have several digital and analog multimeters and got the same results with all of them)

Even after I did the test, I cleaned the connectors and still tested bad (either out of spec or dead).

WTF?

I have already ordered 3 injectors to replace the ones that tested bad, and I'm not worried about the money for those as I am about the inconsistency in the way the car is running.

Has this ever happened to anyone else?

Can anyone illuminate me as to what is going on?

Thanks,

Brad

[Q45tech]

Typical way the injectors fail from age and ethanol. I've seen some HEAL and Fail and HEAL over a short period before they finally commit suicide for good.

One of mine drove me batty back and forth: bad cold, good warm, bad hot for a few weeks.

We've had one customer change 4 of theirs, one at a time over 6 weeks.They were all corroded and rusted on the injector screen.

As I've pointed out we are seeing exactly the same ratios of failures in 94+ as we were seeing in 90-93.

When did we change all the Texasoil accums 02-03? Bad memory, does system still feel as new? How many miles now?

I would begin to change fuel filters very frequently to remove the water, as you can buy 10 fuel filters for the price of 1 injector.

Which ones were funky? When we record ~200 replacements we can see if there is a positional relationship.

So far 1,2,3 are most popular

[Brad-Man]

Gosh Dennis - my memory is about as bad as yours I guess, I can't remember when I talked T3 into replacing them. I DO remember that I was the first one that they did... I think it was more like 2000...

The injectors that showed dead were front two on the passenger side and the out of ohm range was #8 (also on the passenger side).

Still feels good - only complaint I have is the one I've had for years - when I go over a speed bump or one of the (twenty mph school zone bumps) I get a GRAUNCH out of the left front suspension.

[maxnix]

Tension rods or ball joint? Surely upper links, steering rack bushings, anti-sway bar bushings, link bushings and tension rod bushings are all up to snuff?
Modified by maxnix at 6:18 AM 7/31/2008

[3Q Jay]

I get a GRAUNCH out of the left front suspension.

most likely that is the multivalve.