[t2s2]

Hi All:



I just finished a bunch of engine work and now can't get my car to start. <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" />



The fuel injectors are acting up--I think. Upon startup, the car will run for a few seconds and then shut down. When I pull the plugs, they are drenched with fuel. I am told this happens when one or more injectors fails--they go into full duty cycle. anyone familiar with this problem? Anyone now how to diagnose individual injectors?



Thanks in advance



Terry

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[frank moran]

[quote name='t2s2' date='Jan 16 2006, 07:42 PM']Hi All:



I just finished a bunch of engine work and now can't get my car to start. <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" />



The fuel injectors are acting up--I think.  Upon startup, the car will run for a few seconds and then shut down.  When I pull the plugs, they are drenched with fuel.  I am told this happens when one or more injectors fails--they go into full duty cycle.  anyone familiar with this problem?  Anyone now how to diagnose individual injectors?



Thanks in advance



Terry

[right][post="14653"]<{POST_SNAPBACK}>[/post][/right][/quote]

did this just start with the work you performed. First recheck your work.....It sounds to me like you may have pinched an inj. wire to ground?

To check the injectors remove the connectors and use an ohm meter accross the inj. terminals, a bad one will show up as having a significant different reading.

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[t2s2]

[quote name='frank moran' date='Jan 16 2006, 08:24 PM']did this just start with the work you performed.  First recheck your work.....It sounds to me like you may have pinched an inj. wire to ground?

To check the injectors remove the connectors and use an ohm meter accross the inj. terminals, a bad one will show up as having a significant different reading.

[right][post="14654"]<{POST_SNAPBACK}>[/post][/right][/quote]

Thanks. I suspected a grounding problem, so I rechecked all the wiring, and nothing obvious showed up. But I'll take another look and do the ohmmeter check.

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[frank moran]

[quote name='t2s2' date='Jan 16 2006, 08:26 PM']Thanks.  I suspected a grounding problem, so I rechecked all the wiring, and nothing obvious showed up.  But I'll take another look and do the ohmmeter check.

[right][post="14655"]<{POST_SNAPBACK}>[/post][/right][/quote]



what work did you perform,? is the problem since you did the work?

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[t2s2]

[quote name='frank moran' date='Jan 16 2006, 08:38 PM']what work did you perform,? is the problem since you did the work?

[right][post="14657"]<{POST_SNAPBACK}>[/post][/right][/quote]

Thanks you guy for responding.



Yes, the problem is since I did the work. The biggest thing was I installed a new set of cams. I also did all new seals, belts, water and pump. I am confident I timed the cams properly, as well as all the belts.



At no time in all this did I remove the injector rail, though I did depressurize/disconnect the fuel lines so I could get the cam cover off.



Today I pulled the injector rail, attached a catch bottle to each injector, and cranked the engine. Each injector showed an intermittent (timed pulse) spray pattern, as I think it should, so I put things back together, and the same problem occurred again. I am going with the short idea, as an experienced mechanic friend (unfortunately on the other coast) also thinks. He thinks I bumped something during all the work that is causing a short, but I'll be darned if I can it.



I had this problem once before in the past and solved it by replacing al the injectors, but that's so expen$ive. I also have a spare ECU I can swap in to see if that's acting up.



Terry

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[frank moran]

[quote name='t2s2' date='Jan 16 2006, 09:14 PM']Thanks you guy for responding. 



Yes, the problem is since I did the work.  The biggest thing was I installed a new set of cams.  I also did all new seals, belts, water and pump.  I am confident I timed the cams properly, as well as all the belts. 



At no time in all this did I remove the injector rail, though I did depressurize/disconnect the fuel lines so I could get the cam cover off.



Today I pulled the injector rail, attached a catch bottle to each injector, and cranked the engine.  Each injector showed an intermittent (timed pulse) spray pattern, as I think it should,  so I put things back together, and the same problem occurred again.  I am going with the short idea, as an experienced mechanic friend (unfortunately on the other coast) also thinks.  He thinks I bumped something during all the work that is causing a short, but I'll be darned if I can it.



I had this problem once before in the past and solved it by replacing al the injectors, but that's so expen$ive.  I also have a spare ECU I can swap in to see if that's acting up.



Terry

[right][post="14660"]<{POST_SNAPBACK}>[/post][/right][/quote]

I doubt very much that you need injs or an ECM, recheck all your connections, I'm new to the 968 world but have some expericnce, is't there a cam or crank angle sensor on that engine, is it plugged in? go back over everything you plugged or unplugged, do the simple stuff first before looking for a bad inj or ecm etc. it sounds like you have fuel, do you have good spark? you said it starts but shuts down?

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[t2s2]

[quote name='frank moran' date='Jan 16 2006, 09:43 PM']I doubt very much that you need injs or an ECM, recheck all your connections, I'm new to the 968 world but have some expericnce, is't there a cam or crank angle sensor on that engine, is it plugged in?  go back over everything you plugged or unplugged, do the simple stuff first before looking for a bad inj or ecm etc. it sounds like you have fuel, do you have good spark? you said it starts but shuts down?

[right][post="14665"]<{POST_SNAPBACK}>[/post][/right][/quote]

Yup, I'm in the process of checking everything. Tomorrow I'll check all the injector plugs to see if one is shorting out to ground.



I have spark and I have fuel--lots of it. Just not in the right sequence with each other.



thanks







Terry

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[rustech]

I'm with Frank on this, recheck the connections. With the car dieing after a couple seconds, you would naturally have unburned fuel remaining on the plugs.



On Edit: Is your idle stabilizer motor connected? Is there a large vacuum line you left disconnected?



Good luck.

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[Jason Judd]

t2s2,



I might be able to help you with a replacement fuel rail and injectors. I have a full set I can sell you cheap.



When we did the turbo conversion to my car we changed out a lot of stuff...I'm now running 72# injectors with a new fuel rail.



E-mail me if you're interested.



Jason

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[frank moran]

[quote name='t2s2' date='Jan 16 2006, 07:42 PM']Hi All:



I just finished a bunch of engine work and now can't get my car to start. <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" />



The fuel injectors are acting up--I think.  Upon startup, the car will run for a few seconds and then shut down.  When I pull the plugs, they are drenched with fuel.  I am told this happens when one or more injectors fails--they go into full duty cycle.  anyone familiar with this problem?  Anyone now how to diagnose individual injectors?



Thanks in advance



Terry

[right][post="14653"]<{POST_SNAPBACK}>[/post][/right][/quote]

did you figure it out yet?????????

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[frank moran]

[quote name='frank moran' date='Jan 19 2006, 08:38 AM']did you figure it out yet?????????

[right][post="14774"]<{POST_SNAPBACK}>[/post][/right][/quote]

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[t2s2]

[quote name='frank moran' date='Jan 19 2006, 08:40 AM'][right][post="14775"]<{POST_SNAPBACK}>[/post][/right][/quote]

Yup. The idiot who installed the cams (me) managed to get the intake cam mis-timed. Car now purrs like a kitten.





Terry

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[frank moran]

[quote name='t2s2' date='Jan 19 2006, 06:34 PM']Yup.  The idiot who installed the cams (me) managed to get the intake cam mis-timed.  Car now purrs like a kitten.

Terry

[right][post="14802"]<{POST_SNAPBACK}>[/post][/right][/quote]

Good, lucky you did not bend any thing up, like valves..... I may be diving down on the one I have, using a lot of oil. Need to do more diagnosing.

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[rustech]

[quote name='t2s2' date='Jan 19 2006, 04:34 PM']Yup.  The idiot who installed the cams (me) managed to get the intake cam mis-timed.  Car now purrs like a kitten.

Terry

[right][post="14802"]<{POST_SNAPBACK}>[/post][/right][/quote]



Glad you figured it out...7 links from exhaust cam tooth to intake cam tooth.

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