[LowFlyin99GT]

Is this an issue that may be able to be resolved without reflash or replace? I haven't had the chance to get it on a good scan tool, but the Innova at my store tells me that the system rediness won't complete. It had been driven long enough that it should have gone into closed loop and be runnin off the sensors. I have never seen any PCM of any kind do this, and im not getting a single DTC. Any advice would be great. Its prolly getting hooked up to one of those expensive Snap-On jobbers tommrow, but ideas flowing in ASAP is cool with me! thanks in advance!!

[LowFlyin99GT]

i have open and closed loop backwards...my bad.

[NeverEnuff]

How long are you driving it for?

[WickedSnake00]

A number of things can cause the car to stay in open loop, and most are sensor related.

The first I would look at is to make sure your upstream HOS (heated oxygen sensors) are hooked up. Then check other sensors, such as coolant temp and MAF. Make sure they are all hooked up and functioning. If the car (or sensor in the HOS case) isn't getting up to temperature, or if it does not have sufficient data for air/fuel trims it will stay in open loop.

[limited]

Originally Posted by LowFlyin99GT Is this an issue that may be able to be resolved without reflash or replace? I haven't had the chance to get it on a good scan tool, but the Innova at my store tells me that the system rediness won't complete. It had been driven long enough that it should have gone into closed loop and be runnin off the sensors. I have never seen any PCM of any kind do this, and im not getting a single DTC. Any advice would be great. Its prolly getting hooked up to one of those expensive Snap-On jobbers tommrow, but ideas flowing in ASAP is cool with me! thanks in advance!!

do you have any mods?chips? tune?

[bulloch27]

Originally Posted by WickedSnake00 A number of things can cause the car to stay in open loop, and most are sensor related. The first I would look at is to make sure your upstream HOS (heated oxygen sensors) are hooked up. Then check other sensors, such as coolant temp and MAF. Make sure they are all hooked up and functioning. If the car (or sensor in the HOS case) isn't getting up to temperature, or if it does not have sufficient data for air/fuel trims it will stay in open loop.

^^^This.

Shouldn't be an EEC problem, should be an input to the EEC problem.

[LowFlyin99GT]

O2s are all hooked up. Car is getting to temp, but when i hook the scan tool up to it, it says that readiness moniters not complete (P1000) and it flashes the EVAP monitor is the one thats not ready. I know nothing about the EVAP system so i dont know what to check. Mods are; BBK CAI and 75mm TB, Granetelli plenum, modified factory H-pipe with 3" crossever and downstream cats gutted into Mac mufflers with no tails. The car was working just fine up until about 2 months ago.

[LowFlyin99GT]

Originally Posted by NeverEnuff How long are you driving it for?

over an hour on multiple occasions

[bulloch27]

P1000 is common and won't clear itself for a few miles of driving, sometimes more than a few. O2s aren't the only sensors in this equation. MAF, IAT and ECT play a large role, read the outputs on them and determine if they are functioning.

[MineralGreyGT]

Originally Posted by LowFlyin99GT over an hour on multiple occasions

It's not a matter of time its a matter of distance. Reset the system and drive about 100 miles then check again.

[WickedSnake00]

Originally Posted by LowFlyin99GT O2s are all hooked up. Car is getting to temp, but when i hook the scan tool up to it, it says that readiness moniters not complete (P1000) and it flashes the EVAP monitor is the one thats not ready. I know nothing about the EVAP system so i dont know what to check. Mods are; BBK CAI and 75mm TB, Granetelli plenum, modified factory H-pipe with 3" crossever and downstream cats gutted into Mac mufflers with no tails. The car was working just fine up until about 2 months ago.

Ok, this sounds like your problem is your P1000 code, not open loop. Having a P1000 code DOES NOT mean your car is in open loop. You can smell when your car is in open loop, and your gas milage will suck. You know how it smells real rich at startup and idles high, then the smell dissipates and the idle drops? That's it going into closed loop. All P1000 means is that one of your systems is "not ready," it will still go into closed loop with a P1000.

Originally Posted by bulloch27 P1000 is common and won't clear itself for a few miles of driving, sometimes more than a few. .

It's very common. Have you cleared codes recently? That will do it. You'll have to go through the Ford drive cycle for that monitor for the code to go away, though my EVAP monitor usually pops within 40mi (sometimes as little as 5) if I have an EVAP leak.

If we can narrow this down to an EVAP system problem I wouldn't worry. EVAP is horrible, and really doesn't effect your driveability or performance, it's just another emissions control.

[LowFlyin99GT]

Originally Posted by WickedSnake00 Ok, this sounds like your problem is your P1000 code, not open loop. Having a P1000 code DOES NOT mean your car is in open loop. You can smell when your car is in open loop, and your gas milage will suck. You know how it smells real rich at startup and idles high, then the smell dissipates and the idle drops? That's it going into closed loop. All P1000 means is that one of your systems is "not ready," it will still go into closed loop with a P1000. It's very common. Have you cleared codes recently? That will do it. You'll have to go through the Ford drive cycle for that monitor for the code to go away, though my EVAP monitor usually pops within 40mi (sometimes as little as 5) if I have an EVAP leak. If we can narrow this down to an EVAP system problem I wouldn't worry. EVAP is horrible, and really doesn't effect your driveability or performance, it's just another emissions control.

Thanks for the info. Gonna throw it on a good diagnostic tool today and see what happens.

[LowFlyin99GT]

ok....so after 3 hours of diagnosis....here is what we found. Vac leak in the EVAP system and a dead ABS module. Gonna go through the EVAP system Friday night and see if maybe i got a wireing issue to the abs module. Will post results.

[WickedSnake00]

Originally Posted by LowFlyin99GT ok....so after 3 hours of diagnosis....here is what we found. Vac leak in the EVAP system and a dead ABS module. Gonna go through the EVAP system Friday night and see if maybe i got a wireing issue to the abs module. Will post results.

That is good news.

EVAP really has no point, and you can live without ABS. Hell, the PO of my car destroyed the left front ABS wiring, and let the rear ABS sensor drag on the ground. I don't need it.

Better still, look how many guys do the ABS delete.

[LowFlyin99GT]

I know the evap has no point....but a vac leak is a vac leak.....and if the abs isn't a simple fix....it's not getting fixed.