99 Cobra loss of power!!!! HELP!!!!

[PotatoC570]

Morning SVT...again...

I have a 99 Cobra I have worked out all the kinks since the rebuild, I have about 600 miles on the motor now. I have been driving it back an fourth to work. However, yesterday on my way home I was cruising highway speeds and my motor seem quiet, I lost all power. I coasted to a stop and got a tow. When I got home I restarted the motor and it was running super rough and would stall in seconds. I took a laser thermometer and measured the manifolds, the whole driver side of the engine was 75 to 80 degrees, as opposed to the passenger side where I would see temps of 100 to 200 degrees for those few seconds it would run. I checked all fuses and relays. Since there is 2 ignition relays, and 1 starter/ignition relay that are all the same. I am going to pick up a new one today since 2 of the 3 seem to work just fine. I have brand new plugs but the car itself has 90500 on the odometer. Is there anything I should look at if the relay does not work? I assume it is a relay because the it is one whole side of the motor, and it suddenly happened it is not like it was a hit or miss thing.

 

[01yellercobra]

That's really weird. Did you check the plugs on the harness? Maybe something wasn't locked in all the way and popped loose.

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[PotatoC570]

That's really weird. Did you check the plugs on the harness? Maybe something wasn't locked in all the way and popped loose.

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I went home last night and checked. I have spark going to all the plugs, I also smell raw fuel dumping in. So that would leave air, is there a possibility that the MAF or TPS just quit?

 

[RX1Cobra]

I don't think either of those problems would only affect one bank of the motor. Maybe cam timing on that side? If you have spark and fuel I'd start with a compression check on that bank.

 

[01yellercobra]

A MAF or TPS would affect all cylinders. Not just one bank. I would think cam timing, but if it ran for 600 miles I would think it's ok. That's not to say it couldn't have jumped a tooth or something. That's not something I've personally seen, but that doesn't mean it can't happen.

Were the plugs wet when you pulled them out?

 

[PotatoC570]

It is really hard to tell which one are firing and which are not even if that is the case. When I pulled the plug and turned it over it started up every single time. I went through all 8 and they all had spark and you can hear the pistons "popping" with the air pushing out. If it was a timing issue would it not knock or tick because of it being a 32 valve interference motor. The plug were wet when I pulled them out to check spark. It will start, run for a few seconds, I can put my foot to the floor and nothing happens. It does not respond to full throttle what so ever.

 

[01yellercobra]

How did you check the spark? Usually if the plug is wet it's a sign there's no spark.

Or....I wonder if your FRPS blew? When I had one blow the car run like crap, was hard to start, and I could smell the gas. It might be worth pulling the FRPS and seeing if you can blow through the vacuum port.

 

[PotatoC570]

How did you check the spark? Usually if the plug is wet it's a sign there's no spark.

Or....I wonder if your FRPS blew? When I had one blow the car run like crap, was hard to start, and I could smell the gas. It might be worth pulling the FRPS and seeing if you can blow through the vacuum port.

I put pulled one spark plug at a time, plugged it into the coil pack and rested it on the engine, as I cranked my step dad watched and saw that all 8 had spark.

 

[slonech]

compression test will tell alot about the problem.... sounds like it may have jumped time due to cam bolt or something backing out