914 2.0 injector issues, Help Options

[Vicioso]

I replaced my fuel injectors on my 2.0 - 4 and the car will not run it seam's like I'm getting fuel any ideas?

[rjames]

I replaced my fuel injectors on my 2.0 - 4 and the car will not run it seam's like I'm getting fuel any ideas?

It won't run at all, or runs badly? Did it run before?

Have you verified that the injectors are firing and that they are getting fuel?
Any other work done when you replaced the injectors? Timing?
What have you done so far to troubleshoot?

Need more info to help...

[914Sixer]

Tell us about the replacement injectors, are they Standard Motor Products FJ67?

[emerygt350]

If you turn the key on and actuate the throttle you should here them clicking as the TPS does it's job.

Also, no reason to 'think' it's fuel. Spray some starter fluid in it and if it starts right up, you know it's fuel.

[rfinegan]

Does the fuel pump prime on key on or hear it while the starter is engaged?

[fiacra]

This is such a common scenario... I did X and then Y happened. For just one example see a recent thread about replacing spark plugs and wires, and then the car not starting. You need to very carefully inspect every area that you worked in. Assuming the car started and ran before you did this, even if it ran poorly, the odds are really high that you knocked something loose or put something back on incorrectly. This is why you take a lot of pictures before touching anything. Speaking of which, post pictures, give some more background information, and you will get some good advice and a path forward. In the above referenced case it turned out the CHT connection was disconnected by accident causing a no-start condition. A posted picture helped an eagle eyed member spot that and solve the problem. So, I'll reiterate, post some good pictures to let everyone see the wiring and how things have been reconnected. And, just for fun, check the CHT connection....

Oh, and follow the excellent advice and answer the questions of the other members who have already chimed in.

[FlacaProductions]

And, just for fun, check the CHT connection....

This! It worked on the last one!
And yes...good pictures are key.

[Vicioso]

I replaced my fuel injectors on my 2.0 - 4 and the car will not run it seam's like I'm getting fuel any ideas?

It won't run at all, or runs badly? Did it run before?

Have you verified that the injectors are firing and that they are getting fuel?
Any other work done when you replaced the injectors? Timing?
What have you done so far to troubleshoot?

Need more info to help...
Yes It ran fine with the old injectors when we replaced with the new ones things went bad, we found out the ECU was working but the fuel sensor or pressure regulator was bad so I had that rebuilt. the valves were adjusted new plugs and wires, rotor and cap replace and valves were adjusted. the car starts but it seams like its running on one cylinder and will not idle at all.

[Vicioso]

Yes I sprayed starter fluid and it ran great for about two seconds, the plugs were wet it seams like I'm getting fuel. the original injectors were a single spray the new ones have three outlets does that matter?

[Vicioso]

Tell us about the replacement injectors, are they Standard Motor Products FJ67?

Yes, I just checked the box and they are Standard model number FJ67 is this the issue? The stock ones ran before this. trying to better the car does not always work out I guess

[Vicioso]

I just checked the box and yes they are Standard FJ67

[fiacra]

Yes I sprayed starter fluid and it ran great for about two seconds, the plugs were wet it seams like I'm getting fuel. the original injectors were a single spray the new ones have three outlets does that matter?

Yes, if you use the wrong injectors you cannot expect the car to run properly. It has already been asked, but which injectors did you use? As far as I know the only suitable non OEM injectors that work are the Standard Motor Products FJ67 injectors. You can get your original injectors refurbished. Many of us use MrInjector. (Edit: I see you answered that question while I was writing this).

If the car ran fine, why did you replace the injectors? And, importantly, did it run fine AFTER all that other work and then you replaced the injectors and ran into your current problem. Whenever you touch something you have to eliminate it as a variable. As an example, did you check the fuel pressure after you replaced the fuel pressure regulator.

If the CHT is disconnected the car will run rich and will either not run or run poorly. Have you checked connections?

If you are not sure how to post pictures read the help section. Most of the time I will simply take them with my phone, email them to myself, resize them when emailing, and then post them from my computer.

[Vicioso]

Just checked the CHT its fine and yes the car ran after the tune up and valve adjustment. The issue started when I was replacing the leaking injector seals, I discovered that one injector fell apart in my hand so I decided to replace them

[Superhawk996]

Just checked the CHT its fine

What does this really mean?

It’s connected? You measured the resistance and it’s in spec?

Likewise - earlier you posted “ Yes I sprayed starter fluid and it ran great for about two seconds, the plugs were wet it seams like I'm getting fuel.

Again - what does this mean? You need to be more specific on what is going on for folks to assist.

If it runs on starting fluid that points to a fuel problem. Will it keep running if you keep shooting short bursts of starting fluid?

When you say the plugs are wet - have you flow tested the new injectors to see that they are actually flowing fuel?

Post picture of the plugs. At what point were the plugs wet - after extended cranking or are they just wet and oily from the get go? Plugs get fouled and will no longer work. Have you confirmed you have spark at the plugs? All these sorts of little details matter.

Not trying to be a jerk or be critical but you’re leaving a lot of folks that want to help you guessing as to what has been done and what’s going on.

[JeffBowlsby]

There is a lot in this text that begs more info:

"the fuel sensor or pressure regulator was bad so I had that rebuilt....the car starts but it seams like its running on one cylinder and will not idle at all"

-914s do not have a fuel sensor, what is this?
-What is the 'pressure regulator'? Are you referring to the manifold pressure sensor (MPS?) or the fuel pressure regulator? The fuel pressure regulator is doubtful to cause a problem.

The MPS on the otherhand...is a critical sensor and must be tuned correctly to your engine if it was just rebuilt. Please clarify & elaborate.

Have you confirmed that the three fuel injection ground wires in the fuel injection harness (3 pairs of two wires each) at the top rear of the engine case are connected to the ground lug?

Any visibly broken wires in your fuel injection harness?

[Vicioso]

Sorry I work on Motocross bikes way easier. yes I'm talking about the MPS and it was rebuilt by a shop in California and just returned. I have a stock motor not rebuilt. I will check the ground wires when I get home to make sure there all connected. Thank you! I'll keep you posted. This is my first 914 and I'm trying to learn more about the car as a hobby, so far its been fun replacing easier things I just need to get thru this issue.

[Superhawk996]

Sorry I work on Motocross bikes way easier. …

This is my first 914 and I'm trying to learn more about the car as a hobby, so far its been fun replacing easier things I just need to get thru this issue.

Same principle for combustion applies so you should have a head start.

Fuel
Compression
Spark
Boom

I’m sure I’m taking your comment about the fun of replacing parts out of context but it’s important to realize that it is far better to diagnose the problem than to throw parts at it. Swapping parts as a means of diagnostics often creates as many problems as it solves given how fragile 50 year old wiring has become and how easy it is to bump and loosen simple spade connectors.

As Jeff noted, the MPS is critical and swapping in the wrong or a miscalibrated MPS will cause issues. Same for swapping a fuel pressure regulator.

Have you read and do you understand the Djet system as outlined on the Brad Anders site and the troubleshooting guide on Jeff’s site?

Start here:

https://members.rennlist.com/pbanders/

Djet parts and component troubleshooting
https://members.rennlist.com/pbanders/DJetParts.htm

Spend some time on Jeff’s website reviewing troubleshooting
https://bowlsby.net/914/Classic/zTN_Man03.pdf

[Superhawk996]

Also seeing you are new to the site (IMG:style_emoticons/default/welcome.png)

[Puebloswatcop]

(IMG:style_emoticons/default/welcome.png) Don't give up. These cars can be very aggrivating at times, but they are allot of fun and the fun far outweighs the aggrivation.

[Vicioso]

I agree the car is fun and will be again once this gets figured out. thanks for welcoming me into the 914 club.