7 replies to this topic

[volvos70turbo99]

just changed my plug wires and distributor rotor , took off, car felt fine, then couple seconds later car started running rough. I am getting a p0304, checked all connections, good, even tried reinstalling the old wires, still running rough, car was fine before all of this. The only thing i can think of is I had my screwdriver on the dist. cap screw and my wrench fell on the positive battery terminal and sparked. I don't know if I fried something, but i checked all the wires on the cap and they are in the right order and seated properly.

[scumcity14]

misfire in cyl.4...The wrench shouldn't have been a problem if it just quickly "sparked"..Go back over everything and make sure Distributor is installed correctly and rotor is on correctly and not hitting any of the terminals under the cap..

Lesson number 1...The sparking wrench is why we disconnect the Neg. cable when working on the car.

Edited by scumcity14, 03 February 2012 - 09:54 PM.

[volvos70turbo99]

scumcity14, on 03 February 2012 - 09:52 PM, said:

misfire in cyl.4...The wrench shouldn't have been a problem if it just quickly "sparked"..Go back over everything and make sure Distributor is installed correctly and rotor is on correctly and not hitting any of the terminals under the cap..

Lesson number 1...The sparking wrench is why we disconnect the Neg. cable when working on the car.

theres only one way to install the cap and rotor correct?

[volvos70turbo99]

my car actually idled perfect after the install and ran great for 20 seconds, then all of a sudden it started running rough and now idles rough.

[scumcity14]

volvos70turbo99, on 03 February 2012 - 10:10 PM, said:

theres only one way to install the cap and rotor correct?

Make sure the rotor isn't cracked and sitting crooked on the distributor shaft. try old rotor and then old cap...process of elimination.

Also make sure crank sensor and cam sensor wires aren't being interfered by the coil wire.

Edited by scumcity14, 03 February 2012 - 11:04 PM.

[volvos70turbo99]

ok so i swapped the old rotor, still running rough, cap is fine, very clean, theres only one way to put on rotor and cap so i know its right, so confusing.

[volvos70turbo99]

well heres an update on this, got the car towed to my mechanic, tried everything and he did a compression test and cyl 4..... 0., also cyl. 5 compression is low. He said he is not sure if its the head or the block yet, he also said its a 14 hr job to take apart the head, check it and put it back together, that seems a little much.

[volvos70turbo99]

so gonna drop another motor in this, which one would you guys pick, having my mechanic do this:

first motor: just under 70k miles, $950, 6 month warranty or 6k miles.
second motor: 77k $500, 30 day warranty