REM installed and seeking translations

[NC Tom]

I finally installed my @NickInTimeFilms REM unit. Went in pretty easy. Doesn't fit quite right, but I'm sure I can fix it.

I decided to post only the readings that are/seemed out of spec.

 

It's a big ask, however, if anyone will take the time to read through these and share their opinions, I would appreciate it.

 

All readings are at idle:

MAP 22.9

VAC 4.2

RPM 582-635

vO2 0.45-.055

EX RICH

LP OPEN

TPS 12

IGN 12/13

mS 9.6

IAC 1 (IAC is not listed in the manual, but is on the REM)

LT 89

 

Many of these appear to be way off normal. I'm wondering if any of them are jointly affected by a single component.

[fiatslug87]

Your O2 sensor is not working properly. Test the resistance between A&B on the sensor itself, should be between 5-7Ω. Aftermarket ones have not been working properly in my opinion.

 

Your TPS reading at idle should be 17, easy to adjust search in Cruisers Tips.

[89 MJ]

Your REM should've come with a printout with information on ranges for all of those parameters.

 

VAC is manifold vacuum, so that number will depend on how much you're stepping on the throttle. You should be closer to 15" Hg at idle though.

RPM seems normal, maybe a little low.

For vO2, reading less than 2.5V, your engine is running rich. For greater than 2.5V, it is running lean. This is normal if the engine wasn't up to temperature yet.

EX RICH agrees with vO2

LP open means the engine is in open loop, which means its running rich.

TPS should be reading 17% when closed, so you need to adjust that.

IGN is your ignition timing. 12-13 seems perfect for base timing.

LT is long term fuel trim. Reading less than 128 means the ECU is commanding less fuel on average than base to run. If its reading 128, its using the base fuel curve. Greater than 128 means the ECU is calling for more fuel than base. 

 

All that data taken from @NickInTimeFilms website:

https://nickintimedesign.com/rem-gauge-readouts/

[Ωhm]

Few more items for your check list:

- Higher than normal fuel pressure

- Leaking fuel injector(s)

- Leaking fuel pressure regulator/check for fuel in hose to manifold

 

 

IAC=Idle Air Control

[fiatslug87]

My O2 comment was assuming it was up to temperature.

[NickInTimeFilms]

2 hours ago, NC Tom said:

All readings are at idle:

MAP 22.9

VAC 4.2

RPM 582-635

vO2 0.45-.055

EX RICH

LP OPEN

TPS 12

IGN 12/13

mS 9.6

IAC 1 (IAC is not listed in the manual, but is on the REM)

LT 89

Figure i'd chime in.

First thing I'm noticing is your vacuum at idle which is really low, but maybe that has a bit to do with the low idle. Check your map vac line is clean and tight in the lower TB port.

The IAC reading showing 1 is odd though as that should be indicating that the ECU is continually trying to lower the idle even though it's already low.

 

TPS is a little low but not the end of the world. adjusting it and resetting the ecu may help a little, or at least feel like it till the ecu relearns the fuel trims. 

 

Speaking of, LT fuel trim is a tad low which sounds like it's running richer than usual, and showing by the o2 sensor i'd say that i'd agree. It's not holding closed loop so it may be too rich to even correct for. Do you have aftermarket injectors?

[rokinn]

I'd start with the vacuum first.  Does your heat go only through the defrost?  If so then you have a leak.  Check the various lines and see if they hold vacuum.  Then move on to some of the others.

[NC Tom]

1 minute ago, rokinn said:

I'd start with the vacuum first.  Does your heat go only through the defrost?  If so then you have a leak.  Check the various lines and see if they hold vacuum.  Then move on to some of the others.

Yes, heat us defrost only. I'll look into it. Any other details?

[rokinn]

Check to make sure the line after it passes the battery down to the vac ball isn't broken.  You can probably just pull on it a little bit and it will come out from there if it is broken.  You can buy a cheap vac tester from harbor freight and test the other lines.  There are other ways to test for leaks also.  Perhaps others will chime in.