No power; No check engine - ZR-1 Net Registry Forums

White Bullet · 09-19-2010

Well I replaced the injectors, coil packs and plug wires. Put it back together and it does not run well. Symptoms are ruff idle, no power under acceleration; misfires occasionally. I drove the car for awhile and at no time did the check engine light come on. My thoughts are I may have the wires landed incorrectly. Any thoughts? Thanks.

TFENT · 09-20-2010

I have a similar problem with mine right now.

Some things we need to assist you:

Fuel pressure reading? idle and WOT
Plugs? How old?
Injectors: What brand? Source?
Vacuum check done?

White Bullet · 09-20-2010

Quote:

Originally Posted by TFENT

I have a similar problem with mine right now.

Some things we need to assist you:

Fuel pressure reading? idle and WOT
Plugs? How old?
Injectors: What brand? Source?
Vacuum check done?

The plugs are new, Injectors are from FIC they are the new ones that look like the originals. and the vacuum pump comes on for a few seconds and stops and does not cycle. As for the fuel pressure I will have to get a pressure gage to check. I will pull it back apart later this week and check the wires and test the coils even though they are new who knows one could be bad. Man this sucks!

TFENT · 09-20-2010

Quote:

Originally Posted by White Bullet

The plugs are new, Injectors are from FIC they are the new ones that look like the originals. and the vacuum pump comes on for a few seconds and stops and does not cycle. As for the fuel pressure I will have to get a pressure gauge to check. I will pull it back apart later this week and check the wires and test the coils even though they are new who knows one could be bad. Man this sucks!

Well, I am seeing a common denominator here IF the plugs are plugged in correctly. I too have those new FIC injectors and have the SAME issues you do. They just sent me a replacement set to try. I will get those in sometime this week and keep you posted as well.

IT SUCKS BAD! I know...

White Bullet · 09-20-2010

TFENT

When I purchased my injectors I got the impression that they were going to flow match them prior to shipment. Did they tell you anything like that or say they tested them before sending them to you originally? I am curious as to whether they test them or boxed them up and send them out. I sure hope it is not the injectors !!!

TFENT · 09-20-2010

Quote:

Originally Posted by White Bullet

TFENT

When I purchased my injectors I got the impression that they were going to flow match them prior to shipment. Did they tell you anything like that or say they tested them before sending them to you originally? I am curious as to whether they test them or boxed them up and send them out. I sure hope it is not the injectors !!!

They did say they were flow matched. However I can't help but to see a very similar problem with a common denominator. I do not want to jump to conclusions. In addition I can't help but to recall several members of this forum stating over and over about how things being "new" doesn't mean a thing. This puts injectors at the top of the list of viable culprits.

The other thing I am gonna do to mine is throw a new set of O2 sensors in since I am getting a lean code...

Hammer · 09-20-2010

Quote:

Originally Posted by White Bullet

Well I replaced the injectors, coil packs and plug wires. Put it back together and it does not run well. Symptoms are ruff idle, no power under acceleration; misfires occasionally. I drove the car for awhile and at no time did the check engine light come on. My thoughts are I may have the wires landed incorrectly. Any thoughts? Thanks.

That would defintley be something on the "to check" list. Certainly wouldn't be the first time wires were crossed, don't ask me how I know. Depending on which wires were crossed, I've seen anything from a small misfire to backfires and flames coming from the carburator.

White Bullet · 09-20-2010

Quote:

Originally Posted by Hammer

That would defintley be something on the "to check" list. Certainly wouldn't be the first time wires were crossed, don't ask me how I know. Depending on which wires were crossed, I've seen anything from a small misfire to backfires and flames coming from the carburator.

Don't you wish the new wires came with numbers on them!!!

I tried a perment marker to identify them and the numbers wiped off as I passed them behind the fuel injector housing. This time I will feed them through one at a time and plug them up as I go

.

pantera1683 · 09-20-2010

Quote:

Originally Posted by White Bullet

Don't you wish the new wires came with numbers on them!!!

I tried a perment marker to identify them and the numbers wiped off as I passed them behind the fuel injector housing. This time I will feed them through one at a time and plug them up as I go

.

You can buy numbered sleeves that fit over spark plug wires. They work great. Try Summit/Jegs

White Bullet · 09-20-2010

Quote:

Originally Posted by pantera1683

You can buy numbered sleeves that fit over spark plug wires. They work great. Try Summit/Jegs

Great idea! I will hunt some down. Thanks

.

09-19-2010	#1
White Bullet Join Date: Apr 2008 Location: Gainesville GA Posts: 231	No power; No check engine Well I replaced the injectors, coil packs and plug wires. Put it back together and it does not run well. Symptoms are ruff idle, no power under acceleration; misfires occasionally. I drove the car for awhile and at no time did the check engine light come on. My thoughts are I may have the wires landed incorrectly. Any thoughts? Thanks. __________________ 1991 ZR1, White/Red.

09-20-2010	#2
TFENT Join Date: Dec 2008 Location: San Diego Posts: 189	Re: No power; No check engine I have a similar problem with mine right now. Some things we need to assist you: Fuel pressure reading? idle and WOT Plugs? How old? Injectors: What brand? Source? Vacuum check done? __________________ Tom MovIt Brakes USA [url]www.TFEnt.com[/url]

09-20-2010	#5
White Bullet Join Date: Apr 2008 Location: Gainesville GA Posts: 231	Re: No power; No check engine TFENT When I purchased my injectors I got the impression that they were going to flow match them prior to shipment. Did they tell you anything like that or say they tested them before sending them to you originally? I am curious as to whether they test them or boxed them up and send them out. I sure hope it is not the injectors !!! __________________ 1991 ZR1, White/Red.