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TPS values and throttle opening

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ReneH

Re: TPS values and throttle opening

This post was updated on .

Hi,

I have had checked all injectors last year. They all shut. I also have a video of the spray...it looks good in my opinion...
Youtube

Here is also a video of a spooky sound my throttle body made last year after reassembling:
Youtube
On a specific position of the throttle screw, I can also recreate this whistling...

I will check the static pressure later.

Today I have checked the TPS value and set it to 1.0V. No chance to start the engine without pushing the pedal...
4.38 ist the maximum I get...is this too less?

By holding it at about 1,000 rpm it still runs rich...ok. I have to say that I still have disconnected the SPOUT, maybe this is also a factor.

My emissions simulation works very well...
It also seems, that I have connected the FPM correctly to the output of the fuel pump relay...by performing KOEO test I get no errors...

I have also removed one of the EGR solenoid fakes, cause my 1989 ECU don't have a pin for it...thanks Bill for the help with it!

Another interesting thing that happens today was after the KOEO test...I seem to have forgotten to turn the ignition key off.
After removing the bridge from STI to SIG RTN, I heard a sound like the fuel pump, when turning the key to stage 1.
But now my engine light (was always on when turning the key to stage 1, before) only lights up while cranking...have you ever heard something like this?

Later I will put the two holes in each throttle plate and look what happens...BTW...I have a 302 throttle body...

René's Profile

Bronco 1986 Ford Bronco XLT 302/347 stroker with 351W EEC-IV and 351W factory cam C6 gearbox. Jeep 1986 Jeep CJ7 256 I6 with T5 gearbox. Buggy 1972 HAZ Buggy 122 Ford Cologne V6
Baron 1994 Chrysler LeBaron convertible 183 V6 4-speed automatic

85lebaront2

Re: TPS values and throttle opening

Administrator

Rene', with the SPOUT disconnected, timing is fixed at the static setting (10° BTDC or 12° if you changed it). Plugging it back in may really help as the rpm will probably come up. Do that check before drilling the throttle plates please.

Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

ReneH

Re: TPS values and throttle opening

Hi Bill,

I've checked it. SPOUT connected, TPS at 1.000 VDC, no chance to start the engine.

Disconnecting a vacuum hose or turn the idle adjust screw full inside, the engine starts.

IAC recieves 11.6V when turning the key.

How can I check if it works?

Maybe also I should check the MAP. I have a Voltage meter with frequency measurement.

Should I check anything else before drilling?

Have I already said, that the throttle body was given in an engine cleaner bath to get rid of the thick deposits in it?

ReneH

Re: TPS values and throttle opening

Sorry for answering myself....

I have read the the TPS needs about 15mins. Of idle run for the ECU to register itself...is this for real?

From FSB:
My TPS was now adjusted away from the edge of the lower tip-in value. After once again disconnecting the battery with headlights on for 30 minutes to erase any adaptive memory, I started the engine and let it idle for 15 minutes to allow the PCM re-establish a relationship with the new sensor.

ReneH

Re: TPS values and throttle opening

In reply to this post by ReneH

FYI: My engine light reacts now as before after disconnecting the battery for some time...

85lebaront2

Re: TPS values and throttle opening

Administrator

In reply to this post by ReneH

If the TPS is at 1 V running then you are well within the proper range. IAC you sould be able to hear it hissing with the intake hoses off the throttle body.

On the MAP sensor, use the chart I sent early in this discussion in conjunction with a good vacuum gauge. I checked and it gives kPa and inHg so you should be able to check it. I would start just key on, engine not running and first see if you have 5 volts from the Orange/White to Black/White wires (same wires go to EVP and TPS). If you have 5 volts, then you should have around 80Hz at the Dark Green/Light Green wire. If you apply vacuum it should increase in frequency as the pressure drops.

Bill AKA "LOBO" Profile

ReneH

Re: TPS values and throttle opening

Hi Bill,

Ok, I'll do checking the MAP, but it's only possible when turning the idle screw fully in. Otherwise the engine won't start....

Shouldn't the engine running before I'm checking the MAP?

I don't know what should help instead of following your advice, thus to drill the holes into the plates to get it idling...

85lebaront2

Re: TPS values and throttle opening

Administrator

No, it doesn't need to be running, the initial check is at atmospheric pressure, then you should be able to suck on the hose to get a response from it. ECU will have to be connected as the 5 V REF comes from it.

Bill AKA "LOBO" Profile

ReneH

Re: TPS values and throttle opening

Oh, Ok...I understand. I'll do tomorrow, cause it's 1 am currently here and I'm a bit tired...

85lebaront2

Re: TPS values and throttle opening

Administrator

Understood.

Bill AKA "LOBO" Profile

ReneH

Re: TPS values and throttle opening

I'm still awake and also tried to measure, but without success...

I have connected my multimeter minus to gnd and plus probe to the map signal...but I don't get anything...no frequency...

What is wrong with my measurement?

Thanks!

ReneH

Re: TPS values and throttle opening

This post was updated on .

I've got a hit...I have connected the MAP directly to the plenum with one of my silicone vacuum hoses and it works!

It was a vacuum leak in the hard-plastic line that connects the MAP with the plenum...

so as the MAP gets no vacuum, it gives advice to put in fuel more and more....

I will replace all lines due silicone hoses...

85lebaront2

Re: TPS values and throttle opening

Administrator

Glad you found it!

I think I mentioned that in the original thread. Now you should be able to get the rest of it sorted.

On measuring sensors, you can't use the actual ground, you have to measure to the black/white sensor return circuit. I found that out the hard way on my 1990 Lincoln Town Car.

Bill AKA "LOBO" Profile

ReneH

Re: TPS values and throttle opening

Yes...I also have measured between SIG RTN and MAP...also 0 Hz

Maybe something with my multimeter is wrong

Ok, now what's the recommended base timing? I have read 12 deg. BTDC is better for a stroked engine...

I will let the engine warm-up today and look if everything works...best I'll perform the KOER test and look what it tells me...

Gary Lewis

Re: TPS values and throttle opening

Administrator

Progress!!!

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI