Hard Start when engine hot SAGA Continue

midnite · 10-12-2008, 04:32 PM

Hi Guys,
This Hard Start when engine hot SAGA continue after replace the temperature sensor from Mandalay and it is still have problem. It turn and everything but the damn injectors wont fire when it hot. What other sensors prevent the ecu from opening up the injectors when it is hot. When it is cold it start right up... It turns but no fire. I just order a lexus es300 air box with sensor in it from ebay see if this help. Also I think the car is miss fire at idle but when rev it up it doesn't miss fire. When i first wire it up I forgot to connect one of the power supply wires to some of the sensor but it run and run rough now I hook it in and everything run fine beside this hard to start when hot. Could this cause problems?

MANDALAY · 10-12-2008, 05:57 PM

Please look at the thread by Lion Hun.
Have you got all those connections. Something is missing . Unless you can tell me that everything is connected up correctly as factory it will be very had to diagnose the problem

midnite · 10-12-2008, 06:41 PM

As far as i know everything suppose to be plug in where it is. CEL is blink constantly no codes. Yes, even that canister plug in plug in :-).

MANDALAY · 10-12-2008, 07:57 PM

Quote:

Originally Posted by midnite

Hi Guys,
This Hard Start when engine hot SAGA continue after replace the temperature sensor from Mandalay and it is still have problem. It turn and everything but the damn injectors wont fire when it hot. What other sensors prevent the ecu from opening up the injectors when it is hot. When it is cold it start right up... It turns but no fire. I just order a lexus es300 air box with sensor in it from ebay see if this help. Also I think the car is miss fire at idle but when rev it up it doesn't miss fire. When i first wire it up I forgot to connect one of the power supply wires to some of the sensor but it run and run rough now I hook it in and everything run fine beside this hard to start when hot. Could this cause problems?

iF you conect the lexus MAF be very careful the pin order is the same . Unless you know for sure l would not do it. Just because it is a Toyota doesnt mean it is in the same order. EG i know for a fact that the Supra one is different with the pin outs.

Lion_HUN · 10-13-2008, 05:18 AM

Yes, the T23 Celica MAF is also 5 pin but the order isn't the same there as well!

midnite · 10-13-2008, 09:27 PM

according to Mr220V the camry 97-01 maf should work so the lexus is using the same engine as camry ... my take on it should work :-)

Quote:

Originally Posted by MANDALAY

iF you conect the lexus MAF be very careful the pin order is the same . Unless you know for sure l would not do it. Just because it is a Toyota doesnt mean it is in the same order. EG i know for a fact that the Supra one is different with the pin outs.

Servin · 10-13-2008, 10:38 PM

Yeah I ran part numbers as long its a 97-01 1MZ AFM it should work. I need to go to the junk yard and pick one up.

MANDALAY · 10-14-2008, 01:16 AM

Quote:

Originally Posted by midnite

according to Mr220V the camry 97-01 maf should work so the lexus is using the same engine as camry ... my take on it should work :-)

Never said it wouldnt work , i said the pins might be in the wrong order

midnite · 10-14-2008, 01:50 AM

hey what are the chance of a bad TPS that cause problem when it is hot from starting? Thing are now eliminate down to that is my only option because if i unplug that it would not start when cold.

MANDALAY · 10-14-2008, 02:01 AM

Realisticaly every sensor goes to the EPC so it can do its calculations. Any sensor could be at fault. Find out what the cel light is telling what is wrong.
Your even assuming everything else is ok. VVTi selenoid. etc

midnite · 10-14-2008, 02:20 AM

the ecu report nothing... it just constant blinking... if i pull a sensor out then it will give me a code but after after i plug it back and reset it... It will go away... this is why it is so damn hard to solve this problem. If it give me a code it would have been easy...

Lion_HUN · 10-14-2008, 04:06 AM

Quote:

Originally Posted by midnite

hey what are the chance of a bad TPS that cause problem when it is hot from starting? Thing are now eliminate down to that is my only option because if i unplug that it would not start when cold.

You should measure the voltage value of the TPS at the ECU (B23 - VTA) when it's cold, when it's hot and not starting, and also when you plugged it out and you'll be smarter.

97-01 non VVTi 1MZ-FE MAF is perfect, it's the same as the RedTop, pin order is the same as well (same part number).

10-12-2008, 04:32 PM	#1 (permalink)
midnite Beams Owners Group Join Date: Jul 2007 Posts: 131 Thanks: 0 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	Hard Start when engine hot SAGA Continue Hi Guys, This Hard Start when engine hot SAGA continue after replace the temperature sensor from Mandalay and it is still have problem. It turn and everything but the damn injectors wont fire when it hot. What other sensors prevent the ecu from opening up the injectors when it is hot. When it is cold it start right up... It turns but no fire. I just order a lexus es300 air box with sensor in it from ebay see if this help. Also I think the car is miss fire at idle but when rev it up it doesn't miss fire. When i first wire it up I forgot to connect one of the power supply wires to some of the sensor but it run and run rough now I hook it in and everything run fine beside this hard to start when hot. Could this cause problems?

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10-12-2008, 05:57 PM	#2 (permalink)
MANDALAY Beams Owners Group Join Date: Feb 2007 Location: victoria AUSTRALIA Posts: 4,210 Thanks: 136 Thanked 112 Times in 107 Posts My Google Map iTrader Rating: (6/100% )	Please look at the thread by Lion Hun. Have you got all those connections. Something is missing . Unless you can tell me that everything is connected up correctly as factory it will be very had to diagnose the problem

10-12-2008, 06:41 PM	#3 (permalink)
midnite Beams Owners Group Join Date: Jul 2007 Posts: 131 Thanks: 0 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	As far as i know everything suppose to be plug in where it is. CEL is blink constantly no codes. Yes, even that canister plug in plug in :-).

10-13-2008, 05:18 AM	#5 (permalink)
Lion_HUN Beams Owners Group Join Date: Mar 2007 Location: Hungary Posts: 385 Thanks: 11 Thanked 13 Times in 12 Posts My Google Map iTrader Rating: (3/100% )	Yes, the T23 Celica MAF is also 5 pin but the order isn't the same there as well!

10-13-2008, 10:38 PM	#7 (permalink)
Servin Beams Owners Group Join Date: Aug 2007 Location: DFW, Texas Posts: 1,250 Thanks: 13 Thanked 54 Times in 42 Posts iTrader Rating: (2/100% )	Yeah I ran part numbers as long its a 97-01 1MZ AFM it should work. I need to go to the junk yard and pick one up.

10-14-2008, 01:50 AM	#9 (permalink)
midnite Beams Owners Group Join Date: Jul 2007 Posts: 131 Thanks: 0 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	hey what are the chance of a bad TPS that cause problem when it is hot from starting? Thing are now eliminate down to that is my only option because if i unplug that it would not start when cold.

10-14-2008, 02:01 AM	#10 (permalink)
MANDALAY Beams Owners Group Join Date: Feb 2007 Location: victoria AUSTRALIA Posts: 4,210 Thanks: 136 Thanked 112 Times in 107 Posts My Google Map iTrader Rating: (6/100% )	Realisticaly every sensor goes to the EPC so it can do its calculations. Any sensor could be at fault. Find out what the cel light is telling what is wrong. Your even assuming everything else is ok. VVTi selenoid. etc

10-14-2008, 02:20 AM	#11 (permalink)
midnite Beams Owners Group Join Date: Jul 2007 Posts: 131 Thanks: 0 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	the ecu report nothing... it just constant blinking... if i pull a sensor out then it will give me a code but after after i plug it back and reset it... It will go away... this is why it is so damn hard to solve this problem. If it give me a code it would have been easy...