Acceleration issue - Page 2

kamikazemkiii · 04-29-2010, 10:59 AM

you have a boost leak

TripleC · 04-29-2010, 01:16 PM

What about the gap on your plugs?? sometimes that can cause detonation issues while under load.
It does for sure on a turbo car

GettaRobo · 04-29-2010, 03:39 PM

Well, the timing COULD be off. Does ignition timing have to do with the distributor? I THINK they've both been checked but I'll make sure. I've had some work done since then so I should really take another video (the car still bogs at 4-5k). There can't really be a boost leak since the car is NA good suggestion though. As for the spark plug gap, I checked it last week and they're at 0.043 right where they should be.

btwilson86 · 04-29-2010, 05:26 PM

Yes, ignition timing has to do with the distributor. It is definitely worth checking, as a lot of people do not set it properly in the first place. It's important that when checking and setting the ignition timing the engine is at operating temperature and the diagnostic box is jumped in the same way you do for checking codes. You then set your base timing to 10? BTDC.

Check here, borrowed this from BillUK in another thread

*Note: You will connect your timing light to the No. 1 plug wire on your N/A*

GettaRobo · 04-30-2010, 04:12 AM

I have solved the issue. It was the freaking injectors of all things. Got the car running today (after a few hiccups such as forgetting to connect the starter wire.) Runs GREAT now. Thanks for everyone's input on the issue and I hope this helps anyone else in the future if they have the same problem. Woohoo!

btwilson86 · 04-30-2010, 05:18 AM

Glad to hear it's up and running strong.

The injectors.... what was wrong with them? Might help anyone who reads this in the future

GettaRobo · 04-30-2010, 05:45 AM

All that I could find wrong with the injectors was that the resistances matched those of turbo injectors (3.8 ohms.) It was also a struggle to get any reading from them at all compared to the injectors from the donor vehicle. I swapped the fuel rail, injectors, and pressure reg from the donor as it was easier that way. The old injectors sounded like they were working properly when I inspected them. I suspect that they were either flooding or starving the engine at high RPM's.

btwilson86 · 04-30-2010, 06:00 AM

Haha, that would explain the black smoke then...

04-29-2010, 01:16 PM	#12
TripleC 3" Exhaust Join Date: Nov 2009 Location: Fort Collins, CO Posts: 103	What about the gap on your plugs?? sometimes that can cause detonation issues while under load. It does for sure on a turbo car __________________ 1JZGTE ,R154, Hallman Boost Controller, HKS bov, HKS Mushroom top Air Filter, HKS Front Mount Intercooler, Greedy Turbo Timer, PLX300 AFC, Custom Divorced Y-pipe, Custom Intercooler Pipeing, RS-R Concept Exhaust, Optima Red Top Battery, Strut bar Brembo Rotors, A1 Traction arms, Megan Coilovers, Stern ST 2 wheels rear 265x30 r19 - front 245x35 r19, New Front Lip, 18 x 8 and 18 x 9 MRR HR2 with whatever for Drift treads 2 additional C12A turbo's(Extra)

04-29-2010, 05:26 PM	#14
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Yes, ignition timing has to do with the distributor. It is definitely worth checking, as a lot of people do not set it properly in the first place. It's important that when checking and setting the ignition timing the engine is at operating temperature and the diagnostic box is jumped in the same way you do for checking codes. You then set your base timing to 10? BTDC. Check here, borrowed this from BillUK in another thread Note: You will connect your timing light to the No. 1 plug wire on your N/A __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

04-30-2010, 05:18 AM	#16
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Glad to hear it's up and running strong. The injectors.... what was wrong with them? Might help anyone who reads this in the future __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

04-30-2010, 06:00 AM	#18
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Haha, that would explain the black smoke then... __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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04-29-2010, 10:59 AM	#11
kamikazemkiii 3" Exhaust Join Date: Mar 2009 Location: raleigh Posts: 138	you have a boost leak

04-29-2010, 03:39 PM	#13
GettaRobo 3" Exhaust Join Date: Apr 2009 Location: Saskatoon, SK Posts: 65	Well, the timing COULD be off. Does ignition timing have to do with the distributor? I THINK they've both been checked but I'll make sure. I've had some work done since then so I should really take another video (the car still bogs at 4-5k). There can't really be a boost leak since the car is NA good suggestion though. As for the spark plug gap, I checked it last week and they're at 0.043 right where they should be.

04-30-2010, 04:12 AM	#15
GettaRobo 3" Exhaust Join Date: Apr 2009 Location: Saskatoon, SK Posts: 65	I have solved the issue. It was the freaking injectors of all things. Got the car running today (after a few hiccups such as forgetting to connect the starter wire.) Runs GREAT now. Thanks for everyone's input on the issue and I hope this helps anyone else in the future if they have the same problem. Woohoo!

04-30-2010, 05:45 AM	#17
GettaRobo 3" Exhaust Join Date: Apr 2009 Location: Saskatoon, SK Posts: 65	All that I could find wrong with the injectors was that the resistances matched those of turbo injectors (3.8 ohms.) It was also a struggle to get any reading from them at all compared to the injectors from the donor vehicle. I swapped the fuel rail, injectors, and pressure reg from the donor as it was easier that way. The old injectors sounded like they were working properly when I inspected them. I suspect that they were either flooding or starving the engine at high RPM's.