JapCarForum Car Manufacturers Lexus/Toyota IS200 / IS300 / SPORTCROSS / Altezza Supercharging & Turbo Modifications Problem with bigger injectors

Problem with bigger injectors

Problem with bigger injectors

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marko45
Member
53
29-07-2021, 03:36 AM
#1
I have installed last saturday my new 1ZZFE injectors with new seals. I still have the 130mm pulley.
I now have problems to start the engine. Till now, the engine was starting at the first time but now I need tow or three times to get the engine started. As soon as the engine is started, there are no problems, no misfire, nothing wrong.
Do you know why ? Do I have to setup something with the new injectors ?
marko45
29-07-2021, 03:36 AM #1

I have installed last saturday my new 1ZZFE injectors with new seals. I still have the 130mm pulley.
I now have problems to start the engine. Till now, the engine was starting at the first time but now I need tow or three times to get the engine started. As soon as the engine is started, there are no problems, no misfire, nothing wrong.
Do you know why ? Do I have to setup something with the new injectors ?

reganlives
Posting Freak
1,230
29-07-2021, 03:47 AM
#2
Do you have one of Patrick's black boxes?
reganlives
29-07-2021, 03:47 AM #2

Do you have one of Patrick's black boxes?

marko45
Member
53
29-07-2021, 03:50 AM
#3
no but that black box is only useful at high rpm, isn't it ?
marko45
29-07-2021, 03:50 AM #3

no but that black box is only useful at high rpm, isn't it ?

reganlives
Posting Freak
1,230
29-07-2021, 04:04 AM
#4
Yes, it prevents fuel cut really. Did you have the injectors cleaned and flow tested? If you change your injectors to be on the safe side its best to get them cleaned and tested. Maybe a faulty injector?
reganlives
29-07-2021, 04:04 AM #4

Yes, it prevents fuel cut really. Did you have the injectors cleaned and flow tested? If you change your injectors to be on the safe side its best to get them cleaned and tested. Maybe a faulty injector?

reganlives
Posting Freak
1,230
29-07-2021, 04:05 AM
#5
Sorry mate, I just re-read this! Have you got any error codes at all?
reganlives
29-07-2021, 04:05 AM #5

Sorry mate, I just re-read this! Have you got any error codes at all?

marko45
Member
53
29-07-2021, 04:12 AM
#6
no error codes at all. Just a problem to start the engine. The injectors were remanufactured injectors and looked reallly in very good condition.
marko45
29-07-2021, 04:12 AM #6

no error codes at all. Just a problem to start the engine. The injectors were remanufactured injectors and looked reallly in very good condition.

Mikey
Senior Member
714
29-07-2021, 04:14 AM
#7
sounds like the fuel is making it way back down the fuel system when its stood so you might have a leek some where ?

Are the Injectors seated properly ?
Mikey
29-07-2021, 04:14 AM #7

sounds like the fuel is making it way back down the fuel system when its stood so you might have a leek some where ?

Are the Injectors seated properly ?

marko45
Member
53
29-07-2021, 04:19 AM
#8
Yes I think so. I have checked for any leaks just after installing the injectors and I saw nothing. Maybe I am wrong.
marko45
29-07-2021, 04:19 AM #8

Yes I think so. I have checked for any leaks just after installing the injectors and I saw nothing. Maybe I am wrong.

Jimbob-T-Lex
Moderator
1,674
29-07-2021, 05:23 AM
#9
I doubt it is flow back as the pump primes the system. Do you have a AFR gauge setup? It is more than likely the fact the injectors are a bigger cc to the standard ones and the ecu is having to adjust the setup when she is finely running as the system will be running lean when you first start up. An idea anyway mines a turbo IS not got experience with chargers
Jimbob-T-Lex
29-07-2021, 05:23 AM #9

I doubt it is flow back as the pump primes the system. Do you have a AFR gauge setup? It is more than likely the fact the injectors are a bigger cc to the standard ones and the ecu is having to adjust the setup when she is finely running as the system will be running lean when you first start up. An idea anyway mines a turbo IS not got experience with chargers

marko45
Member
53
29-07-2021, 05:32 AM
#10
No I do not have any AFR gauge. I was thinking something like that, an AFR problem due to the use of bigger injectors.
marko45
29-07-2021, 05:32 AM #10

No I do not have any AFR gauge. I was thinking something like that, an AFR problem due to the use of bigger injectors.

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