Topic: 22re hard to start and no power?

[MrFatEggs]

I appreciate all the replies on my previous post and I was able to get it running. It now runs but it takes about 30 cranks to get it to start when cold, and just has no power. I have the tps unplugged but would that cause this? I have the timing pretty close now and its running about 7° btdc. Checked it with a timing light. Does anyone know why it's so hard to start when cold, and why it has not power. I checked my cold start injector and that's fine. Would the unplugged tps make it gutless?

[EASYRYDERDANGER]

Why is the TPS not plugged in? 

[MrFatEggs [OP]]

Why is the TPS not plugged in?

The plug is broken on it so it won't stay in place unless you hold it

[EASYRYDERDANGER]

You cant wire tie or zip tie it? 

[MrFatEggs [OP]]

You cant wire tie or zip tie it?

I most likely can. Do you know if it not being plugged in would cause it to be gutless?

[EASYRYDERDANGER]

Well it aids in determining load, that and the MAF.  Make sure it's fully plugged in too. So I would say yes it could cause a lack of power issue, but I personally have never disconnected mine to see how it would run

[EASYRYDERDANGER]

I thought on an older post that you suspected a bad TPS?  You ever test it?

[EASYRYDERDANGER]

I know not having knock sensor plugged in will cause huge lack of power, it's near oil filter and oil pressure sender, inspect connection and wires

[redneckcustoms13]

A 22rs does not have a maf, common misconception no big deal but the air flow meter does have a lot to do with it. Absolutely the tps needs to be plugged in. As do every other sensor on that engine. 22re can be a pain to trouble shoot due to lack of obd2 but if you get all the stuff like unplugged sensors repaired it's a good start.

[redneckcustoms13]

You can test the tps with an ohm meter also it should be set properly

[EASYRYDERDANGER]

Lol, I call em mass air flow meters regardless of type

[OVRAROK]

http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

[Snowtoy]

The unplugged TPS is will cause running issues.

When you checked the cold start injector, did you just test it, or did you make sure it sprayed fuel when attached to the cold start timer?  A bad cold start timer will require the engine to turn over multiple times before it fires up.  You can test the system two ways, the FSM shows pulling the CS injector, reattach it, and see if you get fuel when the key is turned over.  Another way would be to fire the CS injector before you turn the key, you can do this by momentarily applying power to the injector.

[MrFatEggs [OP]]

The unplugged TPS is will cause running issues.

When you checked the cold start injector, did you just test it, or did you make sure it sprayed fuel when attached to the cold start timer?  A bad cold start timer will require the engine to turn over multiple times before it fires up.  You can test the system two ways, the FSM shows pulling the CS injector, reattach it, and see if you get fuel when the key is turned over.  Another way would be to fire the CS injector before you turn the key, you can do this by momentarily applying power to the injector.

I took off the cold start injector and left it off while cranking the engine. As soon as the engine started to crank fuel sprayed out of it.

[EASYRYDERDANGER]

I wouldn't doubt the possibility of this truck having multiple issues but may be worth while to track down lack of power 1st.  2 different symptoms may be because of same failure

[gnob]

Fuel filter?
Clogged cat
Weak spark
Leaking injectors.

You need to actually trouble shoot because we cant fix over the net.

If you have good battery grounds.  My question would be, will it fire on starting fluid when its "cold"?

Have you done any checking on the ECT?  Hows the oxygen sensor?
Alot of people don't realize too much fuel will totally dog you out too.

[sassparilla_kid]

Did you check timing with that terminal on the driver's inner fender jumped?

Sent from my SM-G930V using Tapatalk

[Gnarly4X]

Diagnosing cold starts (or mis-fires) on 22RE is the most challenging issue I’ve experienced with my Toyotas.

I’d rather be water boarded than trying to figure out why my truck will not cold start, and spend the aggravating time and frustration and money to replace the sensors that those Japanese engineers are so dang proud of!

I’m going through this now.  My rebuild does not cold start like it should.

I’ve checked and FSM tested and adjusted 4 of the 8 sensors (Air Flow Meter, Throttle Position Sensor, Water Thermo Sensor, Air Thermo Sensor, O2 Sensor, Start Injector Time Switch, Ignition Primary Signal, and Starter Signal.  Then you have the other devices – Fuel Pump, Pressure Regulator, Fuel Pulse Damper, Cold Start Injector, Injectors.  You also have the Idle Speed Adjusting Screw at the Throttle Body which affects the TPS and the butterfly position.  Bgen and others have suggested replacing several, and that may turn out to be the fix, but these sensors and devices are very expensive.

Assuming the compression, ignition timing, fresh fuel is getting to healthy injectors, good spark, spark plugs, wires, cap & rotor are good, and the battery can crank at normal start speed... then the sensors that seem to mostly affect cold starting are the Throttle Position Sensor (with proper adjustment at the Throttle Body Idle Adjusting Screw, Start Injector Time Switch, Water Thermo Sensor, and the Air Thermo Sensor.

Sensor input to the ECU at cold start, or “start enrichment” are from:  Ignition Coil (Ignition Pulses), Ignition Switch (start signal), Water Thermo Sensor (coolant temp), Air Thermo Sensor (air temp), Air Flow Meter (air flow volume), Throttle Position Sensor (idle, acceleration, full throttle), and Oxygen Sensor (O2 content in exhaust).

If my memory serves me correctly, think it was Mudder in the recent past, that replaced his Start Injector Time Switch, that he believed was good, but the new sensor fixed his hard cold start issue.

I hope this helps.

Gnarls.

[Lewis Hein]

Wow... To fix my cold start issue, I had to twist my choke housing 20 degrees. It took half a day playing with an old carb to figure out, 10 minutes to do, and cost $0. Carb life is good!

N.B. Swapping on a carb intake manifold shouldn't be that hard. Getting the fuel pressure right might be tricky though, but I'm sure it's been done.

[gnob]

Wow... To fix my cold start issue, I had to twist my choke housing 20 degrees. It took half a day playing with an old carb to figure out, 10 minutes to do, and cost $0. Carb life is good!

N.B. Swapping on a carb intake manifold shouldn't be that hard. Getting the fuel pressure right might be tricky though, but I'm sure it's been done.

Dropping EFI for carb is about the biggest super hack mod you can make.

[Snowtoy]

If my memory serves me correctly, think it was Mudder in the recent past, that replaced his Start Injector Time Switch, that he believed was good, but the new sensor fixed his hard cold start issue.

I have found that even when electronic components test within specs, when near the extreme ends of their operating range, they are often the issue.

[redneckcustoms13]

Dropping EFI for carb is about the biggest super hack mod you can make.

When it comes to the ancient Egyptians 22re efi I've been tempted many times to go to carb. Stick with the testing you'll get it sorted out.

[Gnarly4X]

Dropping EFI for carb is about the biggest super hack mod you can make.

Hey gnob,

Sorry, I don't get what you mean by that comment.  I'm not familiar with the phrase "biggest super hack mod".

Can you please explain it?

Thank you.

Gnarls.

[Gnarly4X]

I have found that even when electronic components test within specs, when near the extreme ends of their operating range, they are often the issue.

From previous posts by guys testing, I believe that is a true.

The only problem I see is obviously...... how does one determine "near the extreme ends"?.... especially when they test within specs according to the FSM?

Gnarls.

[EASYRYDERDANGER]

I like the old Toyota EFI.  It's like playing with one of those "learning" electricity boards you get from RadioShack. 

[gnob]

I have found that even when electronic components test within specs, when near the extreme ends of their operating range, they are often the issue.

The problem with testing components like the FSM is this.  Amperage changes everything.  The sensors need to be checked for voltage.  Loading these sensors can totally change your cold ohm value.