1.6 16v STARTING issues in samurai, runs GREAT?!

Nowhere · 02-04-2007, 09:27 AM

Ok, I've got my 1.6 16v in my samurai but I have a STARTING problem...

She cranks nice and fast, the injectors seem (unconfirmed..) to pulse, sparks seem to fire, but it does NOT COLD START...

Once the engine is running, she idles perfectly, the cold fast idle works, no stumbles, hesitations, and sounds GREAT with an open header

She'll HOT start PERFECTLY, maybe 1.5 seconds on the starter and vroomm, fast idle for a sec, then settle down to 800 ish rpm..

I am ONLY able to COLD start the truck by squirting carb cleaner into the brake booster line (then reconnect the hose..), open the throttle a bit, then fire. It'll cough for a second (carb cleaner is not gasoline..), then the gas/normal operations kick in and she's perfect.. wtf?

If I shut it down COLD after it is running by itself, I can not restart it (like 10 seconds after starting/running off the carb cleaner, when the engine is running off the gasoline..).

Again, once she's warmed up, starting is NOT an issue. When @ operating temp, idles great (maybe a little pop here and there, no o2 sensor, open header..), and will restart PERFECTLY..

Any sugguestions on where to start? ECU coolant temp? air temp? distrib, timing?
help?

Hvy_Chevy · 02-04-2007, 09:45 AM

temp sensor?

how cold is cold?

cajunsuzukispider · 02-04-2007, 11:52 AM

do you have one of those valves to let hot air into the intake from a jacket on the exhaust manifold? suppose that valve is malfunctioning, it's possible maybe your intake is closed. ?????
i think it would be vacuum actuated, check the vacuum lines everywhere.

Nowhere · 02-04-2007, 07:04 PM

Quote:

Originally Posted by Hvy_Chevy

temp sensor?

how cold is cold?

Not @ operating temp.. maybe 70 ~ 80* f.. What temp sensor? The ecu or air temp?

Quote:

Originally Posted by cajunsuzukispider

do you have one of those valves to let hot air into the intake from a jacket on the exhaust manifold? suppose that valve is malfunctioning, it's possible maybe your intake is closed. ?????
i think it would be vacuum actuated, check the vacuum lines everywhere.

Irrilevent on the hot air setup.. The 16v does not have a hot air pickup on the header.. I have NOT checked the vacuum lines as it runs PERFECTLY when it warms up or after it first "catches" on the carb cleaner in the brake booster line.. I can make it run BAD by making a vacuum leak... She puuuuuuuuuurs...

abwmike · 02-04-2007, 10:13 PM

ugh. not that im some sort of expert. but our 16valve header came with a hot are pickup tube thing? so that would lead one to believethat it does?

ka4yqi · 02-05-2007, 04:39 PM

Does you fuel pump run when you first turn the key? Should run for a few seconds and quit till you crank it.

Gonzalo Bravo · 02-05-2007, 06:45 PM

Is it connected the black/Yellow wire to the starter fron the ecu? It feeds extra fuel during starts.-

Nowhere · 02-15-2007, 07:46 PM

The fuel pump is hardwired on with a different battery for testing purposes..

Peter H · 02-18-2007, 02:36 AM

Does your fuelpump give enough pressure? When pressure is below specs, ECU prohibits starting...

.

Nowhere · 02-18-2007, 09:58 AM

Yes, verified with an inline EFI pressure gauge.. I think it was 30 ~ 40 psi...

Once it STARTS, she runs GREAT, just no start without a fuel boost..

02-04-2007, 09:27 AM	#1
Nowhere Registered User Join Date: Dec 2002 Member # 15908 Location: Orlando Florida Posts: 426	1.6 16v STARTING issues in samurai, runs GREAT?! Ok, I've got my 1.6 16v in my samurai but I have a STARTING problem... She cranks nice and fast, the injectors seem (unconfirmed..) to pulse, sparks seem to fire, but it does NOT COLD START... Once the engine is running, she idles perfectly, the cold fast idle works, no stumbles, hesitations, and sounds GREAT with an open header She'll HOT start PERFECTLY, maybe 1.5 seconds on the starter and vroomm, fast idle for a sec, then settle down to 800 ish rpm.. I am ONLY able to COLD start the truck by squirting carb cleaner into the brake booster line (then reconnect the hose..), open the throttle a bit, then fire. It'll cough for a second (carb cleaner is not gasoline..), then the gas/normal operations kick in and she's perfect.. wtf? If I shut it down COLD after it is running by itself, I can not restart it (like 10 seconds after starting/running off the carb cleaner, when the engine is running off the gasoline..). Again, once she's warmed up, starting is NOT an issue. When @ operating temp, idles great (maybe a little pop here and there, no o2 sensor, open header..), and will restart PERFECTLY.. Any sugguestions on where to start? ECU coolant temp? air temp? distrib, timing? help? __________________ Your flesh is a relic, a mere vessel. Hand over your flesh and a new world awaits you. We demand it. Last edited by Nowhere; 02-04-2007 at 09:28 AM.

02-04-2007, 09:45 AM	#2
Hvy_Chevy Zeus of the Sluice Join Date: Oct 2002 Member # 14094 Location: Maine Posts: 2,766	temp sensor? how cold is cold? __________________ Size does matter. Leave the Zukes to those who really understand.

02-04-2007, 10:13 PM	#5
abwmike Registered User Join Date: Oct 2006 Member # 80752 Location: Chico, Ca Posts: 387	ugh. not that im some sort of expert. but our 16valve header came with a hot are pickup tube thing? so that would lead one to believethat it does? __________________ hammer down.

02-05-2007, 06:45 PM	#7
Gonzalo Bravo Granite Guru Join Date: Jan 2004 Member # 26772 Location: Viña del Mar/CHILE Posts: 829	Is it connected the black/Yellow wire to the starter fron the ecu? It feeds extra fuel during starts.- __________________ Suzuki Samurai ,2JZ GTE 3.0TT, A340 tranny, NP231 Doubler, TLC Tcase, Coils up front, Q-elliptic, Toys 8" ,5.12, ARBs, Iroks 36.

02-15-2007, 07:46 PM	#8
Nowhere Registered User Join Date: Dec 2002 Member # 15908 Location: Orlando Florida Posts: 426	The fuel pump is hardwired on with a different battery for testing purposes.. __________________ Your flesh is a relic, a mere vessel. Hand over your flesh and a new world awaits you. We demand it.

02-04-2007, 11:52 AM	#3
cajunsuzukispider Registered User Join Date: Jun 2005 Member # 48911 Location: opelousas louisiana Posts: 1,512	do you have one of those valves to let hot air into the intake from a jacket on the exhaust manifold? suppose that valve is malfunctioning, it's possible maybe your intake is closed. ????? i think it would be vacuum actuated, check the vacuum lines everywhere.

02-05-2007, 04:39 PM	#6
ka4yqi Registered User Join Date: Nov 2004 Member # 38153 Posts: 59	Does you fuel pump run when you first turn the key? Should run for a few seconds and quit till you crank it.

02-18-2007, 02:36 AM	#9
Peter H Registered User Join Date: Feb 2006 Member # 67881 Location: Herenthout-BELGIUM Posts: 37	Does your fuelpump give enough pressure? When pressure is below specs, ECU prohibits starting... . __________________ It's not a car, it's not a jeep, it's a legendary Sam...

02-18-2007, 09:58 AM	#10
Nowhere Registered User Join Date: Dec 2002 Member # 15908 Location: Orlando Florida Posts: 426	Yes, verified with an inline EFI pressure gauge.. I think it was 30 ~ 40 psi... Once it STARTS, she runs GREAT, just no start without a fuel boost.. __________________ Your flesh is a relic, a mere vessel. Hand over your flesh and a new world awaits you. We demand it.

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