Problem after changing water pump

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Nov 23, 2005 | 09:11 AM

robfeltner

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Joined: Mar 2003

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From: Melbourne, FL

Problem after changing water pump

Hi,

I just changed my water pump a couple of weeks ago on my 91 vert. Everything is back together and no leaks...thankfully.

But, I seem to have another problem. My 7 seems to be flooding and I can't figure out why. Is it possible that the ECU thinks the car is cold all the time and is choking it. I really don't understand the whole warm up part anyway. That's the only thing I can think of. Any help would be greatly appreciated.

Thanks in advance,

Rob

Nov 23, 2005 | 09:56 AM

Syonyk

Rotary Freak

Joined: Jun 2004

Posts: 2,718

Likes: 1

From: Ames, IA

Did you reconnect the water temperature sensor on the back of the water pump? Alternately, could the one in the pump you swapped in be bad?

-=Russ=-

Nov 23, 2005 | 04:01 PM

robfeltner

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From: Melbourne, FL

Yeah, I get temp readings from the factory temp guage.

Rob

Nov 23, 2005 | 06:42 PM

vaughnc

knowledge junkie

Joined: Mar 2001

Posts: 5,595

Likes: 6

From: Atlanta, GA

How many miles on the engine & body? Fuel injectors may be bleeding off fuel pressure with the car off and flooding the engine. Very typical on higher mileage cars. I need to send several sets of injectors off myself for rebuild & blueprinting.

Nov 23, 2005 | 06:49 PM

Alex6969

The Silver Bullet

Joined: Mar 2004

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From: Kansas City/Springfield, MO

were do you send them in to be rebuilt/blueprinted? and how much does this cost?

sorry to thread jack

Nov 23, 2005 | 07:16 PM

vaughnc

knowledge junkie

Joined: Mar 2001

Posts: 5,595

Likes: 6

From: Atlanta, GA

There are probably local places close to you, but you can send them off to:

On the internet:
www.witchhunter.com
www.rceng.com
www.cruzinperformance.com

Read this thread:

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/clean-injectors-483492/

Some exerps:

Quote:

Originally Posted by Aaron Cake

Professionals will actually flow test the injectors before, during and after cleaning. Generally they also replace all the rubber o-rings as well.

Quote:

Originally Posted by t-von

Update I just got back my injectors from Witchunter.com. Here are the numbers:

Spray pattern:
Before ---- Good / Good / Good / Poor
After ------ Good / Good / Good / Good

Static Flow
Before ----- 113 / 112 / 109 / 105.5
After ------- 114 / 115 / 114.5 / 115

Pulsed Flow
Before ----- 120 / 118 / 112 / 106
After ------- 122.5 / 122 / 121.5 / 122.5

Notice the flow differance on the last two numbers "before" the cleaning (last 2 numbers are for the secondary injectors). That right there is why you need to send these things off to have them professionaly cleaned. That flow differance could easily create a lean condition and be damaging to the engine (especially turbo engines). Mine NA blew the rear rotor with the poor flowing injectors...

Nov 23, 2005 | 07:56 PM

robfeltner

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Posts: 109

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From: Melbourne, FL

the only thing is, this just started without warning. I know that something mechanical usually goes over time. I had no problems starting the car last week.

Rob

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Nov 23, 2005 | 07:59 PM

nopistons13

Senior Member

Joined: Sep 2005

Posts: 261

Likes: 0

From: Michigan

wait. Is there a tem sensor on the 87 N/A model? and if so, would it cause the car not to turn over if it was unplugged? I just changed my water pump, and now my car will not even turn over. i think it is the starter, but it started fine before i changed the water pump, then afterwards the car woudlnt crank... coincidence?

Nov 23, 2005 | 09:09 PM

robfeltner

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Joined: Mar 2003

Posts: 109

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From: Melbourne, FL

I don't know. I plugged the sensor back in. I don't see anything I missed. Does it matter that I had to take off the smog pump? I put that back on okay. I just don't know what I'm missing here.

And btw how I didn't know injectors could be rebuilt???

Rob