Cold Start Injector

4x4countrygirl · 02-16-2007, 09:37 AM

My boyfriend's 88 runner has been starting rough ever since it got cold out. The gas mileage is horrible (about 100 miles per tank in a V6 16 gallon tank) and it sounds pretty bad when you rev the engine. Once it's warmed up, it runs fine again. So, from reading other posts, we are pretty sure it's the cold start injector. Does that sound right?

Anyways... we are going to be working on the truck this weekend and decided that if we could, we would like to replace the cold start injector too. However, we need some help and direction on how to do it. Anyone have some ideas as to how we should go about replacing it? We're not really sure where to start... we have the Haynes manual to go off of and that's about it. Thanks!

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rdlsz24 · 02-16-2007, 09:54 AM

6 miles per gallon? lol. Do you already have the link for the FSM?

http://personal.utulsa.edu/~nathan-b...88coldstar.pdf

I like to use a combination of it and a Haynes or Chiltons.

Rob

linuxrunner · 02-16-2007, 09:59 AM

sounds like cold start injector try...

http://www.yotatech.com/showthread.p...start+injector

or FSM page here:
http://personal.utulsa.edu/~nathan-b...ne/97colds.pdf

Good Luck, I don't have the 3.0, but maybe try unpluging the injector and see if it gets better.

(looks like Rob beat me, the link he gave you i think is for the 22re tho)

Robrt32 · 02-16-2007, 10:15 AM

Quote:

Originally Posted by rdlsz24

6 miles per gallon? lol. Do you already have the link for the FSM?

http://personal.utulsa.edu/~nathan-b...88coldstar.pdf

I like to use a combination of it and a Haynes or Chiltons.

Rob

That link there ive seen it in a few threads and my puter does not open it.. I just have a blank screen.. I'm not very puter literate , what am i lacking to veiw it?

deathstalker · 02-16-2007, 10:23 AM

adobe acrobat reader. if you do have acrobat installed, try doing a save as, save it to your desktop, then open it from there.

rdlsz24 · 02-16-2007, 10:42 AM

Yeah you need Acrobat Reader. It's free: http://www.adobe.com/products/acrobat/readstep2.html

Rob

Turd Ferguson · 02-16-2007, 10:46 AM

Few months ago my CSI malfunctioned and dumped several gallons of gas into the motor (it was backing up thru the exhaust manifold). The wire in the harness that controls it corroded and it wouldn't shut off. My mechanic traced the problem down, and bypassed it. I've been running without it for about 3+ months.

On cold starts it takes a little to crank it over, but a squirt of starter fluid and it fires right up. It idles high (around 1800 rpm) for a few minutes then drops down to around 1K RPM and eventually settles to normal after the oil gets going.

The ÅÅÅÅty gas mileage is a problem, though. Seafoam the motor and see if it improves any.

Robrt32 · 02-16-2007, 10:47 AM

I saved it too desktop and saw it fine.......Thanks alot...I learned alot from it

Robrt32 · 02-16-2007, 10:49 AM

Quote:

Originally Posted by rdlsz24

6 miles per gallon? lol. Do you already have the link for the FSM?

http://personal.utulsa.edu/~nathan-b...88coldstar.pdf

I like to use a combination of it and a Haynes or Chiltons.

Rob

Quote:

Originally Posted by Turd Ferguson

Few months ago my CSI malfunctioned and dumped several gallons of gas into the motor (it was backing up thru the exhaust manifold). The wire in the harness that controls it corroded and it wouldn't shut off. My mechanic traced the problem down, and bypassed it. I've been running without it for about 3+ months.

On cold starts it takes a little to crank it over, but a squirt of starter fluid and it fires right up. It idles high (around 1800 rpm) for a few minutes then drops down to around 1K RPM and eventually settles to normal after the oil gets going.

The ÅÅÅÅty gas mileage is a problem, though. Seafoam the motor and see if it improves any.

Thats the way i have to crank mine now with starting fluid... It runs fine and gets around 27 miles to the gallon.. but it would be nice not having to pop the hood every cold morning

4x4countrygirl · 02-16-2007, 10:57 AM

We have seafoamed the engine and not much change if any. It actually is a completely rebuilt engine that we replaced just this last summer. So, new engine but all the rest are old parts... is there anything else that be causing such a HORRIBLE gas mileage problem that we should be looking into?

4x4countrygirl · 02-16-2007, 11:42 AM

I also forgot to ask about how long it would take to replace the cold start injector? How much work is involved?

Marc · 02-16-2007, 12:56 PM

Quote:

Originally Posted by 4x4countrygirl

I also forgot to ask about how long it would take to replace the cold start injector? How much work is involved?

If it's the 3.0 it takes 5 to 10 minutes to replace.

The hardest part is getting the clip off the connector.

Chapman88SR5 · 02-16-2007, 02:00 PM

Can anyone describe or show me a picture of where the CSI is?

^VooDoo^ · 02-16-2007, 05:25 PM

Another way to check if the coldstartinjector or the enginetemp sensor, Take the plug off the CSI, If its harder to start then the CSI is fine, If no change then It may be the Enginetemp sensor, Thats on the backside of the engine and its the one on the left.
This is also a symtom of a O2 sensor not working or warming up, Check its harness and plug.

SoCal4Running · 02-16-2007, 05:34 PM

Is it not possible that the CSI is just plain leaking even when the plug is disconected????Hence the bad MPG.

02-16-2007, 09:54 AM	#2 (permalink)
rdlsz24 Registered User Join Date: Sep 2005 Location: Pecatonica, IL Posts: 1,483	6 miles per gallon? lol. Do you already have the link for the FSM? http://personal.utulsa.edu/~nathan-b...88coldstar.pdf I like to use a combination of it and a Haynes or Chiltons. Rob __________________ 1988 Xtra Cab Pickup ('94 22RE; 4x4; 5spd) Rancho lift w/ 33x12.5x15 tires & 5.29s

02-16-2007, 10:23 AM	#5 (permalink)
deathstalker Registered User Join Date: Feb 2007 Posts: 30	adobe acrobat reader. if you do have acrobat installed, try doing a save as, save it to your desktop, then open it from there. __________________ '87 pickup 22r std - new to the game, any advice would help out ;)

02-16-2007, 10:42 AM	#6 (permalink)
rdlsz24 Registered User Join Date: Sep 2005 Location: Pecatonica, IL Posts: 1,483	Yeah you need Acrobat Reader. It's free: http://www.adobe.com/products/acrobat/readstep2.html Rob __________________ 1988 Xtra Cab Pickup ('94 22RE; 4x4; 5spd) Rancho lift w/ 33x12.5x15 tires & 5.29s

02-16-2007, 10:46 AM	#7 (permalink)
Turd Ferguson Registered User Join Date: Mar 2006 Location: Maryland Posts: 417	Few months ago my CSI malfunctioned and dumped several gallons of gas into the motor (it was backing up thru the exhaust manifold). The wire in the harness that controls it corroded and it wouldn't shut off. My mechanic traced the problem down, and bypassed it. I've been running without it for about 3+ months. On cold starts it takes a little to crank it over, but a squirt of starter fluid and it fires right up. It idles high (around 1800 rpm) for a few minutes then drops down to around 1K RPM and eventually settles to normal after the oil gets going. The ÅÅÅÅty gas mileage is a problem, though. Seafoam the motor and see if it improves any. __________________ 1990 4Runner V6 SR5, "The Porkchop Express" http://www.yotatech.com/f108/fs-1990...e-area-167493/ NOW FOR SALE!! 2004 Tacoma V6 SR5 TRD See the Misc Forum for my parts for sale! "I'm just like every other normal guy, except I hit the speedbumps at 50, sometimes 60 miles per hour."

02-16-2007, 10:57 AM	#10 (permalink)
4x4countrygirl Registered User Join Date: Jan 2007 Location: Antioch, IL Posts: 38	We have seafoamed the engine and not much change if any. It actually is a completely rebuilt engine that we replaced just this last summer. So, new engine but all the rest are old parts... is there anything else that be causing such a HORRIBLE gas mileage problem that we should be looking into? __________________ '94 Pickup 22RE/5sp/4x4

02-16-2007, 10:47 AM	#8 (permalink)
Robrt32 Registered User Join Date: Jan 2007 Location: Mississippi Posts: 413	I saved it too desktop and saw it fine.......Thanks alot...I learned alot from it

02-16-2007, 11:42 AM	#11 (permalink)
4x4countrygirl Registered User Join Date: Jan 2007 Location: Antioch, IL Posts: 38	I also forgot to ask about how long it would take to replace the cold start injector? How much work is involved? __________________ '94 Pickup 22RE/5sp/4x4

02-16-2007, 02:00 PM	#13 (permalink)
Chapman88SR5 Contributing Member Join Date: Jun 2004 Location: wisconsin Posts: 1,452	Can anyone describe or show me a picture of where the CSI is? __________________ *1988 4Runner* 3.Slow -33x12.5 Mickey Thompson Baja MTZ Radials -4Crawler 1.5" BJ Spacers -OME 2" Leaf Springs -Flowmaster 44 -Engine replaced at 200k -Green Rattle can paint The early bird gets the worm but the second mouse gets the cheese. Hmmm... See more in the** Check out my Truck section God works through Christians; I am a Christian. -George W. Bush

02-16-2007, 05:25 PM	#14 (permalink)
^VooDoo^ Contributing Member Join Date: Mar 2006 Location: Alhambra CA. Posts: 395	Another way to check if the coldstartinjector or the enginetemp sensor, Take the plug off the CSI, If its harder to start then the CSI is fine, If no change then It may be the Enginetemp sensor, Thats on the backside of the engine and its the one on the left. This is also a symtom of a O2 sensor not working or warming up, Check its harness and plug.

02-16-2007, 05:34 PM	#15 (permalink)
SoCal4Running Registered User Join Date: Mar 2004 Location: Oceanside, CA. Posts: 786	Is it not possible that the CSI is just plain leaking even when the plug is disconected????Hence the bad MPG. __________________ '86 4runner 22RE, 5-speed, LC Street EFI head w/ cam, LC Pistons, ARP Head Studs, Downey header, Dynomax 2 1/4" full exhaust, VDO water temp guage, 01-03 Tacoma cd\tape radio with 10" Bazzoka, Downey 2" rear springs, GDI radiator, Torus fan DONE!!!! '68 Ford Mustang Fastback Daily driver with a built 289 and a streetfighter trans.(Retired) 98 Subaru Outback-Took over daily driving duties MicroMatic.com Waco93.com

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